"Ok, hit me with a dare then."
"Hehe, I dare you to, uh... Ooh, masturbate while riding on my ass until you cum" said Jen. Due to being tired, and horny from a day full of pleasure that has not been addressed yet, Jen was feeling a little bit extra kinky at the moment. Thus her perverted dare to essentially have Rachel cum on her ass, while on her ass.
Rachel couldn't control her body as it instantly got up out of the bed and climbed on top of Jen's booty. Once she got all settled in, she couldn't control herself and began furiously masturbating. One hand's fingers were nearly burred to their third knuckle inside her pussy, while the other groped her breasts through her top. Her feet were doing their absolute best to make sure she didn't fall off either.
Jen twisted her upper torso and eagerly watched Rachel get herself off while on top of her. Watching the closest person to her masturbate while on top of her butt was really turning Jen on as well. Her upturned pussy was already beginning to overflow and run down the front of her ass. Using one hand, she split her boobs apart so she could watch as her pussy lips began to split apart a bit, widening until they were in a rounded diamond shape, and fully gaping. the entire area was also extremely sensitive now as well. Jen was so horny that she stopped watching Rachel masturbate, so she could focus on masturbating as well.
With a special amount of care, Jen unhooked the catheter-like tube from her urethra and set it aside. She then opened one of the drawers that was brought down from her room and set near her eggcup bed. Inside it was the brand new dildo her mother had secretly gotten her after finding her collection when she emptied out her room of now useless clothing. Unlike normal dildos, this one had a 3 inch wide rim around the base, likely to prevent it from falling into her pussy too deep and getting stuck inside. Gravity was now her enemy in that regard. Nothing could just "fall out" anymore, thus the wide rim.
But Jen didn't care about the looks too much at the moment. It was usable, and only that part was what really mattered. She had to reach a bit to grab it, as the pipe lodged in her asshole limited her movement quite a bit. But with a quick lean she was able to stretch enough to grab it. Rachel would have helped her, but the curse was still controlling her body since she had not cum yet. Jen wasted no time in plunging the rubber rod right into her flooding hole, sending the pooling fluids over the top and down her front. She has never in her life been this wet before. But it also has never felt so amazing. She didn't even need to do anything. Just letting it sit without moving it was the best pleasure she has ever felt in her life.
Jen felt like she had to grab something, since her hands were not needed to get her off anymore. She frantically looked around for something to squeeze due to the level of ecstasy she currently is experiencing is just that great that if she doesn't hold on to something, she worries that she may go mad. Her breath was already shallow and rapid, as she already was on the brink of orgasming. How could she feel this amazing from just having the dildo exist inside her pussy? She didn't have to move it at all. Just it being there was more than enough.
When Jen finally did cum, it was such a unique experience. First, she felt the urge to remove the dildo, and did so. Then her pussy contracted and squeezed down, closing up the gaping hole from the bottom up, and literally shot the pool of cum out of her hole, splattering it all against the underside of her boobs and a small amount which managed to pass through the gap almost onto her ceiling. Luckily the ceiling was a bit taller than normal, or else she would have left a cum stain on it. Instead, it just went up and came down onto her left tit.
"Holy shit that was quite the squirt" commented Rachel who had cum just a few seconds before Jen took out the dildo.
"You have no fucking idea how good I feeling right now. I have never felt pleasure like that. I still catching my breath too, hee hee!!" pants Jen while tilting her head back to look at Rachel.
Rachel smirked at the dumb look on Jen's face that was likely only visible from her current perspective. "Well, at least we know one thing. The curse is definitely real. So you likely were cursed, and turned. Or it may have been a completely ironic coincidence. But either way, we now have the curse to play around with. So Jen, Transform or Dare, and please pick transform, as I have an idea."
"Hee Hee, Ok. Transform" giggled Jen.
"You will grow a strap of skin between your shoulder blades, connecting them. This strap of skin will in no way interfere with your normal movements in the slightest, and is actually pretty flexible, and can be bent, twisted, pulled, pinched and squeezed without causing you any pain what so ever. It is also incredibly strong too. This will be common for any bouncerbutt who has found a rider. In other words, this is meant for their rider to hold on to in order to not fall off. When not in use, it will retract into your back, seamlessly. but when your chosen rider gets on, it will pushout from the bouncerbutt's back. This strap of skin will also allow the rider to control which direction their bouncerbutt bounces towards to an extent." said Rachel.
Jen felt her back begin to stretch in a two inch thick band between her shoulder blades, as the skin pushed off of her. Once it was extended off of her body by a few inches, it split with a hole down the center, separating the strap from Jen's back, save for the connecting point on either of her shoulder blades. The band then folded back on itself, becoming closer to a rope-like cylindrical shape, than a flat band of skin like a bra strap.
Rachel watched the entire thing happen right in front of her eyes and smiled with glee at the outcome, as she grabbed ahold of it with both hands. The moment she did, Jen's posture straightened up significantly, forcing her head to also face forwards. Rachel experimented a bit by pulling to the left and right, and noticed how it made Jen face the opposite way that she pulled. Jen was giggling the entire time as well. Having Rachel control her direction like this was both odd feeling, and also very natural feeling too which she didn't expect, but also didn't mind either.
Jen then got another idea, and wanted to do it immediately. "Rachyyy, Transform or Dare, Hehehe!"