[Good End, Incest, Age Difference]

"You're sure her palace is this way, right, Umi? We've been swimming for a while, and it kinda looks like you've gotten lost."

"How do you know we're lost? We're underwater, Riku. And I'm a Kraken, so don't you think I've got a good idea of where we're going?"

"Y-yeah. But... You got lost a lot, and Mom always had to come find us. So excuse me for being a little worried."

"Aha. Well, this time we're the ones finding Mom. And I'm sure she'll love that we've come by to visit. If she hasn't started to turn mad again."

"And if she has, then..."

"Then you just leave it to me, 'Admiral'. I've knocked her out of her maddened state once before, and I'm going to do it again if you want me to!"

A soft giggle was shared between two siblings that had been reunited after so long. They truly never thought that they were going to see each other again, but the young boy's faith had kept their bond alive. And it allowed her to find her way home, and from there... Well, to say that they made up for lost time would be an understatement.

The young boy, currently clad in an Admiral's uniform that his sister had grabbed when they were on their way towards the part of the ocean where their Mother currently resided, was Riku. He honestly didn't really fit the uniform, but she insisted on having him wear it. After all, she made him act like her Admiral when she set off on her final voyage. It was only fitting that he kept up the act, even if it wasn't really an impressive act.

His older sister was named Umi. And the last time Riku saw her, she was the same elder sister that he had always looked up to. The same elder sister that smiled at him and hugged him and kept him safe. He loved her a lot. And even after she returned in the form of a Kraken, and showed just how sensual she had gotten after revealing that she still had control over her mind thanks to his faith, that love was as strong as ever. Maybe it had even matured a little. After all, there was a rather obvious tent in his pants, and it's not like he could actively do anything about it while she carried him like a bride...

"W-Why do you have to carry me like this, anyway? T-The bubble around us is big enough for me to stand while you control it, isn't it?" Riku blushed. Why wouldn't he blush when he was being held by his dearest older sister? Especially as she held him so close to her bosom. That hefty bosom that she had already had him get well-acquainted with. It was way, way bigger than it had any right to be. Bigger than it was back when she was a human too. Getting turned into a Monster Girl just made her sexier in all the ways that would help make him squirm...

Umi giggled as she kissed her sweet little brother on the cheek. "I don't have to. But I want to. Is that a problem, 'Admiral'?" This was what she did whenever he got too riled up. She teased him by referring to him by that title. It didn't have any weight, but with their little relationship having taken the form that it did... It just made him squirm even more. And that, in turn, made her giggle as her heart just pounded against her chest. Aaahhh.. He was just so, so cute...

Riku tried his best to hide his face. But the only place he could truly hide it was up against her breast. Which really just played into her plans, but honestly it was better than letting her look at his expression when she made him blush this much. She had never been this teasing, but admittedly he didn't really dislike it either. He just didn't know how to express his feelings when confronted with this kind of behavior.

But at least it helped distract him from the world around him. While he had mentioned the bubble that surrounded them and gave him room to breathe, everything outside of that bubble was part of the deepest abyss. They had gone far below the ocean's surface, all to reach the castle where their Mother ruled. A castle that would've belonged to Umi as well, if she had accepted her role as a Monster Girl and become just as bad as their Mother.

"What are you going to say to her when we get to her, Riku?" Umi asked, her tone turning rather serious for a moment. It was a very serious topic, after all. It had been so long since the two had met, so there were naturally a few emotions that burdened the youth. After losing her for so long...

Riku didn't know what to say. But he just pushed his face up against her breast with a bit more force. Not because he wanted to avoid the issue, but for a bit of comfort. "I... I'm going to tell her how I feel. And how much I missed her. And then I'm going to hear what she says. And... And then I hope that we can all be a family again. That's all I want..." He explained. That was a simple wish from a simple little boy.

"Then I hope she'll listen. Because if she doesn't listen, then I'm going to make sure that she pays for making my sweet little Riku hurt!" Umi cried out, laughing a little as the two descended further and further into the darkness that made up the abyss deep within the sea...

It wouldn't take long before they'd reach the castle. That majestic castle that served as the only source of light within this endless abyss. Rumors among those that were born in the ocean told of this castle. How the legendary Poseidon lived within. A creature even greater than the greatest krakens. That was what they said, but Umi knew the truth. Even if it wasn't too far from the tale they were spinning.

As she felt her brother clinging tightly to her body, she knew that she had to keep him safe and make sure that he didn't lose faith. And for that reason, they had to confront their Mother. Hopefully she wouldn't be in a cranky mood... Or have regressed back to her vicious ways when she ran on nothing but the instinct of her kin...

It was quiet as Umi swam into the grandiose throne room. It was so big that you could fit several small buildings inside. And there was a house-sized throne in the very back, with a sole feminine figure resting on top of it. The figure belonging to the one the creatures of the sea referred to as 'Poseidon'...

In truth, this 'Poseidon' was nothing more than another Kraken. But she was much greater than her kin. Larger. Stronger. Needier. And most importantly, all the more brutal. If she wanted something, she was going to get it. And that was why she had almost managed to turn Umi to her side. All because she didn't want to lose her daughter. She was willing to harm her for the sake of having her by her side...

Riku looked at the sprawling and enormous Kraken. And he felt a little worried. Sure, ultimately she was only around twice as big as his sister, if not a little bigger than that... But that still meant that she utterly dwarfed him. He was pitifully small compared to somebody like her. And it made his heart race with fear. But he had to stay strong. She was still their Mom, right? The same Mom that loved them until the moment she disappeared..?

"Mom! I'm back! And I brought Riku!"

Umi made the daring move to call out to her Mother. Knowing that if she had changed her mind and started to fall further down, then she would probably try to assault both of them with her tentacles. She'd try to snatch them up and squeeze them for all their worth until they were hers and hers alone...

And indeed, the bright red eyes of a predator that opened up in response to the smaller Kraken's voice indicated that she was still as hungry and as vile as ever. "Ahhh... Umi... You've returned..." Their Mother said, as her sleepy smile turned into a vicious smirk. "Then I take it you've come to become a proper Monster Girl. Just like your Mother..."

Riku felt his heart sink as he looked at her. That massive woman... She wasn't his Mother. She was... She was just another Monster Girl. He couldn't feel the warmth that was supposed to leak from her. He couldn't feel anything like that. All that he felt was doubt within his heart, as he squeezed his older sister for comfort.

And that was Umi's cue to let go of her Brother. Not to let him drop down into the darkness that also filled the throne room. He'd keep safe within the bubble that she had made. All while he could watch her do what she promised. All while he saw the sister that he loved do her best to fix the family they were supposed to be.

"I thought I told you when I left!" Umi shouted as she swam right up to her Mother's face, before wrapping her tentacles around the tentacles that made up her Mother's 'hair'. All while putting all of her power into lifting her up. "WE'RE NOT MONSTER GIRLS, MOM! WE'RE FAMILY!"

And before the oversized Kraken had a chance to retort and rebuke her Daughter's words, she found herself toppled. Lifted like she was nothing, and SLAMMED against one of the walls of the throne room. In fact, a closer look would reveal that there were several cracks in the walls in the throne room. This was hardly the first time that Umi had done this, and it wouldn't be the last. Especially if she didn't learn.

"A... Aha..." The older Kraken chuckled softly as she pulled herself off that wall, before slowly shaking off the pain that rushed through her body courtesy of that throw. "I suppose you did say that, my dear. I'm sorry, I got a little lonely while you were away." Her tone turned a lot softer after that. She didn't even seem too bothered by what had just happened. She was just happy to see her dear Daughter again, which reflected in her eyes. They were warm and red, not frightening and sharp...

"Good. You'd better not turn back and end up wicked again. Knocking sense into you last time was hard enough." Umi said, huffing a bit. Geez, she was really the glue holding the entire family together at this point. But if she was the glue, then she had to pay attention to the pieces. "Mom. You should look at Riku. He's been waiting to talk to you for so long."

Riku shivered as both Krakens started to look towards him. And he felt his body squirming as they both got close to that bubble, especially so when he really got a better look at his Mother. She was huge. Way, way bigger than she had any right to be. Which really wasn't doing his pants any favors, as those pristine white things were getting a little stained from a mixture of the shock and his family's sensual figures.

"Ara... So that's how big he's gotten... You remember me, don't you, Riku? It's me. Mommy Nami. I've missed you so much..." Just looking at Riku made the emotions that she had shut away in her heart pour out. Ah... She had forgotten how this felt. The warmth that came from her family. It was one thing to have Umi close by... But to have her dear Riku here too, who she hadn't seen since he was five years old... It made the tears roll down her cheeks, even if she shouldn't be able to cry while underwater.

She wasn't the only one who was crying. Just looking at her now, when that warmth returned to her face and the tears full of emotion rolled down her face... There was only one thing that Riku could feel right now. And that was pure relief at seeing her again. Which was why tears were rolling down his cheeks. "Mom... Mommy!" He didn't even try to act like he was an adult. He just latched onto her and squeezed her as tight as he possibly could. All while the tears just strolled down his cheeks. He didn't know what else to do.

As Nami and Riku hugged one another and got reacquainted through their tears, Umi smiled. And then she noticed exactly where her dear Brother's head was, and she slowly started to lick her lips. Well, they had gotten the emotional reunion out of the way, so it was time to have a bit of fun...

Riku felt a bit of pressure on his back, and then he tried to turn his head. But he couldn't, because there was way too much soft stuff squeezing down on him. And it was then that he realized the very crucial problem with having two Krakens as family members. Namely the fact that they were far, far sexier than they had any right to be...

And now they could dock their breasts up against one another and trap him in between. As they had managed to do right now, even if his Mommy probably wasn't thinking about doing it...

"Say, Mom..." Umi smiled, her voice carrying a playful tone as she put her hand down on her stomach. "Riku and I decided that it'd be best if we started over and made sure that we became a proper family. Would you like to do the same?"

Nami blinked a little, before the older Kraken blushed at what her dear Daughter was implying. "G-Goodness, you really did that with him. I-I mean, that's what you were supposed to do if you were following your instincts, but..." The way she suddenly crumbled really made her look so much like her Son. It was adorable. And as she looked down at her dear boy, she could feel her nethers squeezing together. She wanted it. She wanted him to consummate with her and become a bigger family. Or to put it in the bluntest words possible, she wanted to fuck him and make him fill her womb with his young seed.

"Riku... My sweet, sweet Riku... Please, don't judge me for wanting this..." She muttered as she wrapped her tentacles all around him. Keeping him as close as she possibly could. Pressing him against her. Making sure that he was lined up just right, all while she practically ripped that uniform off him. All while the look in her eyes became more and more crazed, hearts replacing her irises.

Umi should've told him that she got like this. But by the time she remembered it, she couldn't really warn him. Because he was already being thrust into her awaiting folds. His naked cock, which had been throbbing and spraying a few droplets of his seed every few minutes thanks to how hot his family was, was forced into her hole. And naturally he started cumming immediately, because there was no way that he could endure a space as tight as his dear Mother's pussy.

But just cumming once and letting his extra sticky seed spew around inside her wasn't even close to enough. She'd want much, much more. She'd want him to fill her to the point where she could hear it sloshing around inside. She wanted to be knocked up. Just like her dear Daughter!

Riku let out moan after moan as he was forced to thrust into his dear Mommy. It's not that he hated it. Far from it. He actually did like it. He just didn't imagine that it would be one of the first things that he'd do once he met his dear Mother again. He thought that it would last longer before she'd succumb to her instincts...

Then again, she was just like Umi in that regard. She had also done this. Perhaps it was just how their family life was going to be from this point on. And if that was how it was going to be... Then he wouldn't really mind. Because he was with his family. He was with his dear Mommy, and his dear Umi. And that was what made him happy.

Umi ended up wrapping her arms around him as he thrust into their Mother, all so he could have something soft to cushion the back of his head. "You're doing really well, Riku. Really, really well. You're going to be a good Daddy once the time comes, aren't you..?"

A-Ah. That's... Oh goodness. He didn't know what it was going to be like to be a Daddy. And having the thought bouncing around in his head didn't help either. It actually made him tremble too much for him to focus, his cries getting louder and louder...

Until he just couldn't thrust any longer. His climaxes had all added up to him practically losing consciousness. He just rested against his dear Umi's boobies. All while he softly breathed. Softly, sweetly, drifting off to sleep after having one final climax that he couldn't even really vocalize. All with a smile on his face...

"Ahhh... Ahhhhhh..." Nami muttered. She could feel life slowly growing in her womb already. And she blushed as she realized what she had done. "I... Oh, goodness..." She didn't know what to say. What to do. She had bred as a Monster Girl before, but this was something new entirely.

But Umi was there. Hugging her dear Mother. Letting their dear Riku rest between them as she smiled. "Don't worry, Mom. We'll figure it all out together. You, me and Riku. Our reunited family, as sweet as it once was." She was happy. Riku was happy. And Mom would be happy too, once she got used to this.

A family separated by the waves... Reunited under the waves, with more love between them than ever...