Kate and Jess had just gotten back to the apartment from lunch and were already making out before they got through the door. They had been wanting to have sex ever since both of them were back to normal, and now was their chance.  As they stumbled through the living room, ripping clothes off each other left and right, they made there way into the spare bedroom where they hoped to continue their make out session.

As they fell onto the bed, kissing and fondling each other profusely, they heard a faint barking noise coming from the foot of the bed. Looking down over the side of the bed, the two girls noticed the source of the barking. “Aww, look Jess, it’s your little sister Kai! She’s such a cute little pet. And her bark is so squeaky and adorable.”
“Yeah, she is pretty cute.” Jess reached down and scratched her sister on the neck which got a loving response from Kai. “Who’s a good little girl? You are. Yes you are.”
‘Yip, Yip!’ Kai barked excitedly.

“Oh Kate, I could pet Kai all day, she is just so cute! And that tail of hers looks like it’s getting excited as well.” Jess smirked seeing how her sister’s tail, which was a fully functioning cock, was slowly getting erect.
“Oh yeah, that’s my favorite feature that I gave your sister.  I honestly don’t think she realizes that her tail is a dick. But we can help her find out.” Kate winked at Jess who understood exactly what Kate had in mind. “Oooh, you minx. But you know, the more her tail gets erect, the more curious I am to know how it would feel.” Jess finished scratching her sister and lifted her onto her lap. Slowly, Jess began to rub her sister’s tail up and down its smooth shaft, feeling how it throbbed rhythmically. “Alright, I’m convinced. Let’s have sex right now, and use my sister’s cock tail for extra fun!” Jess yelled out to Kate, who was getting turned on from the idea of using Kai in there fun.  Kai meanwhile was in her own world getting pet and snuggled by her sister that she wasn’t paying attention at all to what they were saying. She just really loved being pet.

As Jess set Kai down on the bed, Kate thought of another brilliant idea. “Hey Jess, I know what can make this even more fun.” Kate grabbed the wand from the nightstand and walked over to the peculiar lamp in the corner of the room. With a quick tap the lamp had transformed back into Harmony, who took a a deep breath now that she was human again. “Whoa, that was a strange experience. I felt human still, but I definitely wasn’t. Also, where are my boobs?” Kate quickly noticed and ran over to the bed and grabbed her detached boobs that were currently being used as pillows by Kai.

Kate put the boobs on Harmony’s chest and they immediately reattached showing no signs they ever were separated. “There ya go. Sorry, Kai loved using them to cuddle up to.”
“Oh, no problem. Is that Kai on the bed? Aww, she’s some sort of human dog hybrid. That’s amazing! I wonder how that fe...” Harmony never got a chance to finish her statement before Kate had changed her once again. Kate smiled, “Welp, I’m pretty sure I know what you were going to say, and I’m more than happy to help you find out.”

Suddenly there was another little Human puppy sitting where Harmony once stood. The new pet looked up at Kate with big eyes, clearly disoriented by what happened to her. She tried talking, but all that came out was a high pitched bark, identical to how Kai barked. “You’re just as cute as Kai. And your tail just as eager.” Harmony in her new state couldn’t quite understand what Kate was saying. She could tell she was happy, but she didn’t know why.

Jess watched the whole scene unfold from the bed, while she continued to pet her sister. “Yay! Two pets with two massive cocks! When does the fun begin?”  Kate lifted Harmony up onto the bed next to Kai. They sniffed each other for a moment before jumping on one each other and play fighting. “If they get anymore adorable I might have to keep one,” Kate said unsarcastically. “Now to the real question though. Which one do you want to use?”

Jess looked at the two puppies playing with each other on the bed. She thought both of the girls looked so cute, and there really wasn’t much of a difference when it came to the size of their “Tails”.  “You know what, I think I will go with my sister Kai. I think we’re gonna have some quality sibling bonding tonight.” Kai looked up at her sister who was now stroking her tail once more. “Sounds good to me. Either way, this is going to be the most amazing sex we’ve ever had.” She moved in towards Jess and began kissing her intensely. “Why do we have to wait until tonight” Jess leaned into Kate and began kissing back, and thus started there long pleasure filled night.

Both girls made sure to utilize their pets as much as possible while having sex. In fact, they even modified the two pets some more so their tails were even bigger and more pleasurable.  They took turns intricately handling there pets’ cocktails and pleasuring one another with them.  They also found out quickly that when Kai and Harmony’s tails were ready to orgasm there whole bodies would stiffen as well, which made them more like a traditional dildo at that point. By the end of the night, all four girls had orgasmed numerous times from the relentless energy they all provided. Jess and Kate laid on the bed snuggling close to one each other, while the two pets were passed out squished up between them. It was good they got to sleep when they did though, because the next day was when Jess and Kai’s parents returned, and they had a lot to discuss with their parents.

——————————————————

Finally, two weeks had come and gone, and Friday morning was upon the girls. When Kate and Jess woke up they immediately got cleaned up and turned the other two girls back to normal so they could get tidied up as well.  Jess and Kai needed to get back to their home as soon as possible to be there before their parents returned from their trip. Once everyone was dressed and looked as close to what they did two weeks ago, they left the apartment and headed to the house. When they got there, Jess and Kai quickly went in and made sure the house was exactly how they left it, which honestly, they were impressed by how clean it really was. It might’ve been the cleanest they’ve ever seen it.  Kate and Harmony decided they were hungry so they drove into town to grab something to eat while Jess and Kai sorted things out with their parents.

——————————————————

Once Kai and Jess’s parents were home, it didn’t take long for them to start discussing their plans for the future with their parents. It only took a few hours, but by the end of the conversation Jess and Kai hugged their parents excitedly and were heading out of the house once again.

Kate and Harmony had just gotten back from lunch and could tell by the other girls’ faces that the discussion with their parents went well. “So I assume your talk with your parents went well?” Kate asked  “Mmhm, they were completed on board with both our decisions and they honestly had expected this sort of thing would happen.” Kai said with a happy grin on her face.

“Yeah, I told them I wanted to move in with you full time and they immediately approved. In fact they said that it might be good for you too Kate, and said something about me keeping you out of trouble.” Jess said sarcastically. “Haha, very funny. But I’m so glad they were supportive. And what about you Kai? They were ok with you moving in with us as well?”

“Yep, it almost seemed like they were excited to get me out of the house.” The other girls giggled at the statement. “Welp, I guess we better get to packing up your guys’ stuff so we can get you moved into my apartment.” Kate said eagerly. “If we do it quick enough we can get you both unpacked in the apartment before the end of the day.” All four girls got out and proceeded to pack for the next hour or so, and before long they were heading off to Kate’s place.

——————————————————
The girls finally arrived at Kate’s apartment and were about to get out of the car. Kate and Jess had been talking up a storm the whole drive that they never even noticed anything odd happened. “Alright girls, let’s get your stuff up to your new home!” Kate said giddily. “And now you can have all the time you want with Harmony, which I’m sure you can’t wait to get up to your room and have fun again.” Jess teased. Kate and Jess both noticed an odd lack of response from the other two girls. Typically one of them would have some sort of snarky comeback. But when Jess and Kate looked back at them they found out why the girls weren’t responding. In the back seat where the girls were sitting was two little human dogs happily rolling around together licking each other.

Kate and Jess started laughing together at the scene unfolding in the backseat. “I guess that explains why it was such a peaceful drive.” Kate said with a chuckle. “Yeah, I’m glad we got out of the house when we did. Could you imagine my parents faces if they saw one of their daughters turn into a human dog hybrid?” Both girls pondered the idea and then laughed some more at the thought. “Well, As cute as they are like this I don’t think we can carry them up to the apartment in this state without people giving us weird looks.” Kate said while stroking one of the pets. Jess started grinning. “Well, I guess it’s good that I brought this with us.” She pulled the wand out of the purse she had brought with her. “Oh nice, I didn’t know if you brought the wand with you or not.” Kate said happily. “I figured we would need it for something, and this is exactly that something. But what to turn them into...” Jess said inquisitively.

The girls pondered their options for a bit until Kate had an idea. “Ooh, I have an idea for what to change Harmony into. Can I see the wand real quick?” Kate was so eager to change Harmony into the vision she came up with. “Sure thing, and I’m pretty sure I know what I want to do to Kai as well.” Jess said slyly as she handed over the wand to Kate. Kate reached into the back seat and pulled Harmony away from her lover to the front seat.  “Sorry Harmony, but I want to try a new transformation on you that doesn’t involve your girlfriend. But if it works you’ll be very acquainted with me soon.” Kate said grinning ear to ear.

Jess liked the suspense of not knowing Kate’s plan for Harmony. But she soon found out exactly what the plan was as Kate reached down and gently tapped Harmony’s cock tail with the wand, and shortly after the usual flash of light, Harmony was completely gone. Jess looked around the car to see if maybe she had moved, but she could not find a trace of the girl dog that was in Kate’s lap just a second ago. “Kate, where did Harmony go? Did you erase her completely?” Jess asked, with just a slight bit of concern for the transformed girl. “I would never do such a thing to a friend. And if what I did to her worked correctly, she should be getting a new perspective of one of our bodies.” She said grinning to Jess.

Jess didn’t understand what Kate meant until she felt a weird new sensation in her chest. As she looked down she noticed that her shirt that was loosely fitting before, was now extremely tight over her now massive pair of breasts. “Whoa, did you somehow merge Harmony into my boobs? How did I not notice it right away. This is so weird.” Jess started rubbing her hands over the gigantic globes of flesh on her chest. “They feel so full now, and I’m pretty sure Harmony is getting excited in there because my nipples are hard as hell.” Jess shivered after gently touching one of her nipples. “Yay! I’m so happy my plan worked. I wasn’t sure if the wand could do such a unique change like that. But once again the wand was up for the task. And from the looks of it you are not disappointed in the change.” Kate said seeing Jess squeezing her new gigantic breasts. “So now that we’ve taken care of Harmony, what did you have in mind for your sister?”

Jess finally stopped fondling her breasts when Kate asked her question. She reached over and grabbed the wand from Kate’s hands. “Well I did have an idea to change her back to her normal self, but with a twist.” Kate could hear the devious tone in how Jess talked. She knew she had a twisted transformation in store for Kai. A moment later Jess had tapped her puppy sister on the nose and within a matter of second all that was laying in the back seat was what appeared to be a costume of some sort. Jess reached into the backseat and picked up Kai’s new form and held it up to show Kate what had become of her sister. “Tada! See, my sister is back to her normal self, just a little lighter than she was before though.” Jess said laughing. “Oh wow, you turned your sister into some sort of skinsuit didn’t you?” Kate said while looking over Kai’s floppy hollow form. “Yep, I’ve been wanting to try this transformation out for awhile now and this seemed like the perfect chance. Now I just need to put her on and then we can head up to the apartment.”

Jess lifted the head of her sister that was dropping down hanging flat against her back. Kai was nothing more than a hollowed out form of her former body, no bones or organs to be found. Where her eyes and mouth used to be were now just empty holes, like a Halloween mask would have. Jess climbed into the backseat to get more space while she attempted to climb into her skinsuit sister.  She didn’t want her sister to have a zipper so she knew the only way to climb into her hollow form was through one of her former orifices. She figured the best bet was to stretch open her sister’s mouth and climb in that way. So Jess reached into the skinsuit’s mouth with both hands and stretched it as wide as possible.  Surprisingly, Kai’s mouth was way more stretchy now, so Jess was able to spread Kai’s  mouth wide enough that she could slip both legs into her easily.

As Jess began to wiggle her legs into her sister’s deflated body she could feel how smooth the inside of the skinsuit was. She didn’t realize that she had designed her sister to be easy to slip on. Now her legs were all the way down into Kai’s legs completely, and to Jess’s surprise, the skin fit snugly to her own. She figured it might sag a bit considering Kai was a bit taller than her, but the more she slithered into Kai, the more she realize that Kai was form fitting to her own body. She now had Kai pulled up all the way over her now massive boobs that were still rock hard, and all that was left to do was pull Kai’s head over her own to complete the look.  

Kate started laughing at the unusual sight of Jess putting her sister on as an outfit. From her view it looked as though Jess’s head was sticking out of Kai’s body as though she was trying to eat Jess. The creepy part was how Kai’s mouth was stretched out beyond its normal limits around Jess’s neck, like she had just unhinged her jaw to swallow Jess whole. “Wow, Jess your body look like it never existed.” Kate exclaimed. “I know. It’s weird how she just moulded to my body perfectly. Like, even my giant boobs have conformed to look exactly like hers. I wonder how that feels for Harmony though, being squished down so tightly?” Jess thought.  “Welp, it’s time to finally finish the transformation and become my sister.” Jess reached down and grabbed Kai’s mouth wrapped around her neck and began to stretch and lift it up over her head until finally, Jess was completely submerged in her sister’s body, no trace of her own to be found.  She quickly repositioned her face inside of Kai’s, and once she had her eyes lined up with Kai’s eye holes the outfit settled in on Jess’s body and the change was complete. From Kate’s vantage point Jess’s body no longer was in the back seat and the only person there was Kai, laying seductively for Kate’s viewing pleasure. “Like what you see Kate?” Jess asked seductively.  

“I do indeed.” Kate was so turned on by seeing Jess take the role of her younger sister. She always adored Kai’s perky young body with all of its curves, and now Jess was the proud owner of this remarkable body.  She leaned back and kissed Jess on the lips, and then pulled away smiling. “But now we can’t go up to the apartment together because you’re in your sister’s body completely naked, and we don’t have spare clothes for you to change in to.” Kate said with fake disappointment. “Dang your right, I didn’t think about that.” Jess looked down at her new body sadly, thinking she would have to remove the skinsuit in order to leave the car. “Don’t worry Jess, I have an idea that will solve our problems.” Jess saw Kate reach over to the glove box area thinking maybe she had brought a spare set of clothes for some reason. Thinking this, she turned away and began caressing her new body again, thinking how bizarre it was that she was wearing her sister as a costume.

Jess had closed her eyes for a moment as she continued to play with her body Some more. “So did you find a spare set of clothes for me to put on?” Jess asked still aroused from playing with her body. “Mmm, not quite, but I did find my new dildo.” Jess, not liking the tone of Kate’s voice, opened her eyes to see Kate looking at her with a devilish look, and of course she was already reaching out the wand to transform Jess. “No Kate please don’t....” before Jess could finished she was already transformed into a very similar purple dildo that was almost identical to how Kate looked days before. “I’m sorry Jess, but you were completely naked, and we can’t have you walking into my apartment building in your birthday suit.” Kate said while looking at her brand new sex toy. “Now don’t worry Jess I made you exactly like I was before so you have a special vibrator setting that will make us both feel really good tonight. And don’t feel too sad, because unlike how I was when I was a dildo, you have friends in there with you.” Kate laughed at her last statement. She didn’t realize until after she changed Jess that Kai and Harmony would technically change with her, but now all three girls were trapped in this new phallic prison. What she didn’t realize was that both Harmony and Kai’s minds were basically gone at this point so really the only conscious mind in the dildo was Jess, which was fuming out of frustration that she didn’t see this coming. She couldn’t blame Kate though since it was a pretty clever bit of revenge for how she treated Kate days ago. She could only hope that Kate would use her as much as possible when they got up to the apartment.

Kate picked up the purple dildo and placed it in the purse Jess no longer needed. She through the bag over her shoulder as she stepped out of the car that they had been sitting in for what seemed like forever and began heading for the building. Kate was so happy to be in control of her friends for once and every thought of how she would use her new dildo sent shivers up her spine. She wanted to make the most of her current position of power, and since the other three girls didn’t have anyway of protesting, she began planning out all the fun ideas she had in store for them.