[MILF TF, Incest]

"I'm glad we finally made it to the North Pole, Grandpa, but my stomach hurts. Let's find Grandma fast, okay?"

"Oh, just take your time, Jake. Haste makes waste."

Jake Spankenheimer, and his Grandpa, had just arrived at Santa's home on the North Pole. Why had they gone all the way from Citysville to Santa's home? Simple, Grandma had been run over by a reindeer, and vanished not long after. It was only thanks to Jake's mail to Santa that they found out that Grandma had actually been taken away by Santa and his elves, because they wanted to help her recover from the accident that they had been a part of.

And yet, Jake couldn't help but feel a little uneasy. Sure, he was very happy to get the chance to see Grandma again as he had missed her a lot, but this feeling in his stomach had started right around the time he had sent his mail to Santa, and it had only gotten worse and worse. Maybe it was the stress of it all that was getting to him, and he'd get a sense of relief once he finally saw her again. Either way, he felt kinda bloated. The quicker they'd find Grandma, the better.

Grandpa, by comparison, was just pleased with everything. He had always held the same belief as his Grandson. Santa was real. And despite everyone else in the family thinking otherwise, especially Cousin Mel, he was there for Jake. Which was why he wasn't surprised to hear that they got a response, and it wasn't too surprising that they ended up having to go to the North Pole either. If anything, it almost seemed like he had expected it.

The doors to Santa's home opened up, and the jolly old man himself stepped out. "Ho ho! Grandpa Spankenheimer and Jake! I've been expecting you! And especially you, Jake!" Santa Claus laughed in such a joyous and jolly way. He didn't get a lot of guests, and he was always so busy for next Christmas. So naturally he enjoyed some company.

"Santa!" Jake called out in joy as he ran over, naturally hugging the lovable old man who returned the favor almost instantly. "You really are real! I can't wait to tell everyone back home!" He was overcome with emotion. Validation of the belief that he had held all this time...

Grandpa smiled in turn, chuckling at his grandson's enthusiasm. "Say, Santa. Where's Grandma? You mentioned her in your mail, but I don't see her around. Come to think of it, you're a married sort, aren't you? Where's Mrs. Claus?" He asked some rather pointed questions while his Grandson was overcome with his childish happiness.

Why was Mrs. Claus important? Of course they hadn't seen her, she'd probably be inside the house cooking cookies for all the elves. So why did she matter?

Santa laughed in such a jolly manner, before letting go of the young boy and patting him on the head. "Straight to the point, Grandpa. I'm not surprised." He said, a smirk working its way onto his lips. "Well, since you were kind enough to come along with Jake, I don't see anything wrong in showing you both." His words seemed slightly foreboding, especially as he turned his head to look into the house. "Honey! Come out, we've got a pair of very special guests!"

The ground started to shake ever slightly as a heavy set of steps echoed from within. All while Jake's expression went from happy, to perplexed, to outright shocked as he saw a very familiar woman stepping out towards the doorway. Which contrasted Grandpa's smile widening further and further the more he saw of that lovable woman that approached...

Neither Jake, nor Grandpa, had ever seen a woman as big as her. She was outright bigger than Santa, at least in the fat department. It looked like she was filled with Christmas Spirit, especially since that very same fat belly that happened to surpass Santa's own size seemed a little firmer than a belly should. Or maybe she was outright pregnant, it was hard to truly tell given the layer of soft flesh that covered it.

Though her belly was hardly the only thing that stood out about her. Her excessively long hair that had been tied into one astonishingly big gray bun served to highlight that the rest of her body was big as well. Tits bigger than her head, and especially milky given the wet spots on her extra tight red Santa dress, and an ass that would take up an entire couch all to herself. Combine that with a set of thighs that even made little Jake blush from how alluring they were, and her manicured red nails complimenting the rest of the subtle makeup that made her look a little younger than she really was, and she looked like an exaggerated and overly sexualized Mrs. Claus...

"Oh, Jake! Grandpa! How I've missed you!"

But she wasn't just Mrs. Claus. No, she was Grandma. That was why Jake was so shocked, and why Grandpa was so pleased. Jake couldn't fathom that Grandma would turn out this way. All he could do was just stare, even as the massive elder pulled him close to her belly and snuggled him nice and tight, even managing to pop his head right in between her tits thanks to the precariously tight button that held her dress together allowing for ample cleavage both above and below her breasts.

Grandpa smiled as he saw his beloved wife again, chuckling a little as Jake was subjected to several loving kisses that covered his face in her candy-cane colored lipstick. "I know you said you and Grandma got busy, but I can't say I expected this, Santa." He said, though he really didn't sound like he was hurt or disappointed by what he saw. If anything, he was just impressed. Though the outline in his pants told a different story.

"Well, when you're as lonely as I am, you can't help but get a little intimate when you finally get somebody to spend those nights with." Santa laughed, lightly reaching over to spank Grandma's exposed ass. "Isn't that right, Mrs. Claus? Or is that Grandma now?"

After planting yet another kiss on Jake's canvas of a face, Grandma finally stopped showering him in all the affection she had in her. "Grandma will do for now, sweetie. But don't forget, I'm your Mrs. Claus. Always and forever." She said, giggling a little as she leaned over and planted a kiss straight on Santa's lips. A kiss that he returned with glee as he grabbed her head and pressed their lips together in such an intimate manner.

Jake was beyond confused. And utterly overwhelmed by everything, especially as he managed to slide out of his Grandma's cleavage. Grandma was Mrs. Claus now? And Grandpa was okay with it? Not to mention his stomach was hurting again, which just made things even more complicated...

Santa heard the sound of Jake's upset stomach, before chuckling a little. "Grandpa, Jake, you two should join us. We're having turkey tonight, and I'm sure you'll love it. Grandma makes the best dinners, making it feel like it's Christmas every night. Ho ho!"

Grandma laughed as well, walking deeper into the house while Santa spanked her on the ass again just to see her massive body wobble from trying to handle her own weight. All while Grandpa just watched and smiled...

"I-Is this really okay, Grandpa? Don't you love Grandma?" Jake asked his Grandpa, hoping to get an answer that would help him figure out how to handle all of this. He was still so, so confused...

"It's alright, Jake. You'll understand soon." Grandpa said, patting his Grandson on the head as he helped him inside. All while smiling as he heard the boy's stomach loudly rumbling...

Now it was up to Santa to uphold his end of the bargain.

---

Jake sat at the dinner table, and on any other day he would probably love all the food that was on the table. He would've loved everything about it. There were so many dishes that he loved, and a big fat turkey that would probably leave him hungry for more even though he wouldn't be able to eat another bite.

But right now, all he could do was clutch his stomach as the whining got worse and worse. All this food looked delicious, but his stomach really didn't want him to eat. Not yet. Especially not as it felt like his stomach was trying to push up against his arms.

"I'm sure you're confused, Jake." Santa said, clearing his throat a little to get the boy's attention despite the pain. "First, I want to apologize for not saying anything earlier. Grandma didn't want you to know until you were ready. But she and I..."

"We fell in love, Jake." Grandma followed up, giving her big hubby a kiss on the cheek again. "Santa did everything he could to make sure I wasn't hurt after everything that happened. And I saw sides of him that I had never imagined. And one thing led to another, and he asked me to become his Mrs. Claus. I said yes, because of course I didn't want to leave him without a wife." She explained, before chuckling a little and digging a hand into her belly to bring emphasis to all the fat that had packed onto her form. "That's when I asked if he could make me look the part. I didn't expect for him to want his wife to be this fat, though!"

"Oh, don't act like you don't love it, Grandma." Santa said, squeezing his hand into her belly as well. Right before spanking her again and making that body of hers wobble all over in delight. "Of course, when you sent me that mail, Jake, I just couldn't keep the secret any longer. So that's what's happened since the accident." He concluded, before taking a glance towards Grandpa. "I gotta say, Grandpa, you've got great taste."

"Right back at you, Santa." Grandpa laughed, not at all bothered by having his wife stolen like that. "Speaking of my tastes... That special gift you promised. That'll be coming soon, won't it?"

Jake raised an eyebrow, as the pain in his tummy slowly stopped. He blinked, looking at Grandpa. Did he ask Santa to cure his stomach troubles..?

"Of course. One Cousin Mel with a Heart filled with Christmas Spirit, coming right up."

Santa snapped his fingers, and the sensation in Jake's belly intensified. All while a moan was forced from his lips, and his chair whipped around so it was facing a mirror. All so the young boy could see what was happening to him.

His shirt burst open to reveal a pair of breasts that were far bigger than they had any right to be, with his pants ripping apart moments later to reveal a matching set of thighs that looked almost as juicy as the Christmas turkey's. All while moan after moan echoed out, changes rapidly forcing their way through his body.

Jake could just barely see his body growing bigger in the mirror, complimenting the growth of these new feminine curves. Ending with him looking like he had the stature of an adult woman... As well as the hair of one. Long, flowing red locks. All while his face shifted in shape bit by bit, until he looked eerily familiar. Maybe a little curvier than a certain... Oh, oh god no.

"I'm Cousin Mel!?" Santa's words weren't just for show. That's what Grandpa had wished for. Cousin Mel, but with a good heart. His heart. Or Her heart now, considering the utter lack of male parts anywhere on her figure. It was enough to make Jake whip around and look at her Grandpa with a few tears running down his cheeks. "G-Grandpa! Why would you want Cousin Mel?!"

Grandpa sheepishly smiled as he scratched the back of his head. "Well, Jake... Have you seen that ass of hers? She can really make it bounce, and even an old man like me can't help himself." He explained, a blush working its way further onto his face. "Truth be told, we did do the deed once or twice. But she was still Cousin Mel, so I couldn't simply ask Santa to have her as my new wife. Soooo..."

"Grandpa, you rascal." Grandma and Santa said in tandem, both promptly laughing alongside him. To the three of them, this didn't seem too bad. It was just a simple wish, a gift that Santa gave him to repay for what he had done.

Jake, on the other hand, couldn't handle this at all. The shock of it all overwhelmed her, until she ended up collapsing on the chair and losing consciousness. It was far too much for her to handle. So much so that her subconscious mind worked overtime to avoid her breaking.

This was all a dream... Yeah... It had to be...

---

"Oh, good, you're awake. I thought we had lost you after that little stunt, Jake."

Jake's eyes had fluttered open a few hours later, hoping that it really had all been a dream. They had made it to the North Pole, and she had been turned into Cousin Mel. That part was definitely a dream. It had to be. But they had met Grandma again, and she was safe. She was... she...

Shock and horror filled the transformed woman's eyes as she noticed that Grandma looked just as she did in her dream. And it was impossible for Jake to avoid seeing her tits hanging from her chest. It hadn't been a dream. Grandma had become Santa's obese and extremely affectionate Mrs. Claus, and Jake had become a curvy copy of Cousin Mel. The sight of her own body twisted in such a fashion was more than enough to make her feel nauseous...

"G-Grandma... T-This isn't right..." Jake muttered, only to feel even more nausea as she heard her own voice. It was Cousin Mel's bitchy voice. Just filled with his good heart. It was enough to make her feel like she should go throw up. She hated Cousin Mel due to everything she had done towards Grandpa and Grandma, so to become her was one of the worst things she could ever experience...

Grandma chuckled and helped the transformed woman out of the bed, turning her towards a bedside mirror. "Jake, dear, you're going to have to live with it. This is what Grandpa wants, and Santa can't just take back wishes that come straight from the heart like that one." She explained, to try and give her Grandson-turned-Granddaughter...

But she didn't listen. No, Jake was utterly fixated on her new body. Because it had grown while she slept. Her curves seemed even heavier and even fatter, something that was especially evident by the sag that had been added to her bosom. All while a subtle bit of fat had grown on her belly. Well, subtle in comparison to the rest of her curves. She definitely looked like she had packed on about fifty pounds over the course of a night... And it still seemed like she had room to grow too...

To make matters ever slightly worse, she had been dressed into an appropriate outfit while she slept. Appropriate for a slut, maybe. That new body of hers, a bonafide MILF body, was now squeezed into a red crop top with an extremely low cut, that basically left absolutely nothing to the imagination, as well as a set of red leggings that hugged her figure so tightly that you could nearly see the outline of the hole between her cheeks...

"Heh." Grandma chuckled, not too surprised by Jake's utter shock and inability to handle everything. So she spanked her. Gave her a taste of how it'd feel to be handled roughly by a lover. All while wrapping her arms around the new woman. "You know, Grandpa always wanted me to be curvier while we were younger. So you're making up for lost time with that kind of body. Though, knowing Santa, he might've just added a bit of extra Christmas Spirit to really make you pop."

"No, no, that was all Grandpa. He told me what he wanted, and I made sure to give him what he asked for."

Before Jake had a chance to get to terms with anything, whether it was her body, the arousal, or the fact that she was to be Grandpa's wife, Santa and Grandpa made their way into the room. With Grandpa more than pleased at the sight of Jake's body having truly matured into the kind of woman he loved, evident by the bulge very prominently packed into his pants.

"Don't sell yourself short, Santa. You did your very best." Grandpa chimed, as he walked towards his new plump wife, wrapping his arms around his former Grandson and squeezing her nice and tight. All while digging his hands into that ass, even forcing fingers underneath that tantalizing fabric. "Though, we might just have to make sure you lay off the cookies, honey. We don't want the others to worry about you once we get back home!"

Jake was filled with all sorts of conflicting feelings. Especially as Grandpa touched her in such a sexual way. Her heart was slamming against her chest. She could feel something dripping down below. And every time that she looked at Grandpa, she couldn't help but feel a kind of pull towards him. Like... Has he always been this handsome..? N-No, she shouldn't be thinking about her Grandpa in that way!

Santa, noticing that Jake was still looking so uncomfortable about everything, couldn't help but chuckle a little. "Adorable. Still so nervous about it all on the first night of her marriage." He said, before looking to Grandma. "Should we give the lovebirds a little hand, dear?"

"Oh, I think they can handle it." Grandma said, before chuckling a little as well. "But yes, we should. Just a little gift from us to them, to celebrate their brand new love for one another." She wanted the best for Jake, and that meant that she was willing to help him get over this nausea.

Jake had to hope that it couldn't get any worse. It was bad enough that Grandpa made her feel this way. But knowing Santa and Grandma, they probably had something in mind that would blow her mind.

Besides... S-She wasn't about to fuck Grandpa on the first night, was she..?

---

Jake should've learned not to hope. She should've learned to expect the worst. And yet she foolishly went along with whatever Grandma had planned for her. Thinking that she would help her and maybe get her back to normal.

Instead, both of them were now wearing sling bikinis. Red and white sling bikinis that looked like a long and stretchy candy cane pressing into their most intimate areas, neither of them even being closed to covered up by it. If anything, their sexy and extra plump bodies were being emphasized by the way the fabric really dug into them.

And to make matters even worse, Grandma guided her into a hot tub, where both Santa and Grandpa were waiting, both completely naked. Thankfully, there were more than enough bubbles in the water that made it impossible to see their... c-cocks... But that didn't stop it from feeling just as awkward as everything else.

Not to mention, there was another mirror hung up not far from the hot tub. And Jake had caught a glimpse of her body in the mirror. N...No, it was... It was Cousin Mel's body. Not hers. She wasn't Cousin Mel. And she definitely... definitely wasn't Grandpa's wife...

That was what she had thought when she lowered into the hot tub. Grandma had promised her that it'd just be a nice, relaxing soak inside the warm water. And that was what she had believed. Even though she was sitting up against her handsome hubby- Grandpa...

Then the alcohol got involved. Red wine that very quickly worked its way through Jake's system. She had never ever gotten a taste, because she had been too young. But the alcohol immediately affected her inhibitions, a permanent red blush stained onto her cheeks as she let the warmth of the hottub nearly overwhelm her...

"You know, Jake." Grandpa said, just as drunk as his new wife was. All while he wrapped his arms around her plump waist and rested his head on her heavy breast. "This'll all be easier if you just accept it. There's no reason to worry. I'll take care of you. And I'll make sure that you're loved, just as much as I once loved Grandma."

"Grandpa..." Jake muttered as she tried her best to fight against her instincts. But it was like she was in a haze. The alcohol was impairing her judgment heavily. So much so that her body essentially acted on auto pilot, reaching towards the older man with her lips puckered and ready to plant a big kiss right on that cheek of his.

Grandpa preempted her. Kissing her on those very same lips with a great big smile on his face. "That's better. Just be honest, Jake. You're a woman now. A sexy, seductive woman. And I wouldn't want you any other way." He said, his voice sounding a lot more seductive than before. Or maybe it was the alcohol that was making him sound that way.

Either way, Jake wrapped her arms around him just as he did to her, and pulled him close. Wrapping her legs around him as well, allowing him to press deeper between her thighs. Even as she felt that throbbing length push up against her. She knew that she shouldn't let him do what he was about to do...

But Grandma and Santa had already begun doing the same. Except in their case, it was Santa pressing Grandma against the edge of the hottub, so he'd get a great grip on her hips. The sound of their lovemaking served as the backing track that hammered into Jake's mind, and made her more and more accepting of what came next.

She could feel it, once Grandpa thrust forward. The sensation of her virginity being taken from her. The sensation of a male breeding her. The sensation of love being consummated. All those overwhelming feelings filled her to the point where she couldn't handle them. So it wasn't surprising in the slightest that she was quick to orgasm...

But that would just be the first of many. Grandpa wasn't deterred by the sudden tightness. No, he pushed one of the slings aside and latched onto her breast as he thrust harder. Really imprinting the sensation of being bred into her psyche, aided by the haze of all the alcohol in her system.

Jake’s orgasms came in rapid succession. It was all so new for her, so naturally she couldn’t handle it. And so her screams served to accompany the sounds of the water around her splashing, as well as the needy and loving cries from her Grandma. It was a display unlike any other. A loving display that would make her sick to her stomach, if her mind was anywhere close to sober.

But she wasn’t sober. And as Grandpa kissed her to share his love with her, she felt his own climax approaching. And like the drunk MILF she was, she just squeezed him tighter and forced him to go deeper. All for the sake of satisfying her brand new need.

Then she felt it. She felt the sensation of him cumming inside her. She felt the rush of fertility pour through her. The realization that she was still fertile. And the fact that she was no doubt going to end up pregnant because of all of this.

It sobered her up, even as she was hit by another orgasm. She felt the shame. The nausea. The love. And the cravings. All while looking at Grandpa, who just smiled at her after he pulled back.

“I can’t wait to show you to the family, Jake…” He whispered, letting his head rest against her bosom as he let the afterglow consume him. “Once we’ve really made love to one another…”

All Jake could think of was being Grandpa’s, and her body trembled in delight despite his mind being disgusted. And all he could hope for was one tiny wish… She hoped that she could hold out, and not return Grandpa’s intoxicating and perverted love in the same way Grandma was returning Santa’s…

All while life slowly took root inside her, and her heart kept beating with love for him…