"Um, I guess both?" Said Rachel.
"Yay! Ok, you will lose your ass, and your ass cheeks will now push into your body, and it all matches my ass." Says Jen excitedly.
Rachel was trying her best to piece together what that meant. "So, my ass will now be concave, and fit perfectly around the top of your ass?"
"Haha! Yeah yeah! Now we can share having my big, bouncy booty! It's going to be so much fun!" giggled Jen.
"I see, well it does sounds interesting... Anything else, or are we moving on to the dare portion?"
"Umm, ooh! Your feet will have like, a half dick shaped bone on the heels. And when you sit on me, you can fuck me by putting your feet together. Oh, and when you are walking, the half dick-shaped bone will turn to point downwards, giving you a natural high heel." Said Jen.
"When you say half dick..."
"Like if a dick was split in half, right down the middle. The flat, "cut" side will face inwards towards your feet."
"It is just shaped like a dick though, right?"
"Umm, sure. Ooh, but you can cum out of it if you put your feet together and line one up with the other half."
"Then that isn't just dick shaped Jen!"
"Hehe! So what? I think it will be fun. And you will feel good too, so dont worry so much, rach-yy."
"How long?"
"Huh?"
"How long will it be? 3 inches? 5 inches? How long? If this is going to be my new feet, then this means that I am going to be walking with a natural heel now, if it is too long, then my toes won't even reach the ground. Or do you plan on making the soles of my feet have a natural platform too?"
"I like that idea. Hee hee! Yeah, let's make them adjustable, and your soles will grow out a platform if needed. And while I at it, I want your feet to be able to walk on any surface barefoot without any pain or discomfort. And it makes the heel clacky sound when you walk on hard surfaces too!"
"Well, I guess that isn't too bad. Maybe a bit awkward having 2 half dicks on my heels, but it isn't too bad. It could definitely be horrifyingly bad or something, but this sounds like it could be a lot of fun too."
"I know right? Anyways, for your dare, I want you to~, um... Ok! I want you to fuck me with your heel dick. Ooh and also I want you to now dress extra sexy/kinky for me from now on too. I think you would be so hot when wearing just a corcet bra and microskirt when we go out someplace, but you don't always have to wear that specifically. It just has to be sexy, and hot, and a bit slutty on occasion too. I want my rider to be so eye catchingly beautiful that people get jealous that I get to be her choosen butt!" Rambles Jen as she thinks up a dare on the spot.
"Jen! What the hell!" Laughs Rachel as she hops off of Jen's ass in order to watch the changes. She strips naked too, since she may as well get use to being naked around Jen. Sure enough, her ass deflated and sucked inward, becomming concave as she gained 6 inches of height. Her heels were lifted 6 inches in the air and her toes grew a 1 inch tall platform underneath them to compensate, giving Rachel a sexy looking 6" platform sandle look. "God, I look like I am wearing pleaser heels with how the white bone looks". Commented Rachel as she inspected her new feet. Her heels definitely looked like dicks from the back side. Some really good looking, 6" long dicks with a nice big head and were pretty big too. If she were to ever want a dick to fuck her, she would have wanted it exactly like this. Now she owned that dick, and would be fucking her bouncerbutt mount's pussy with it shortly. Her clothes on the ground changed as well. What once was a baggy Tshirt and short shorts, turned into just a sexy bra that would stay on her boobs without needing the straps, allowing them to be draped down her arms, and a microskirt that never would be long enough to cover anything important, although it isn't like she has an ass anymore. Feeling her concave rear, Rachel was a bit weirded out by it. So she climbed back onto Jen and took a seat. Her ass fit Jen's like a glove. A perfectly seamless fit. Like Jen's ass was her ass too. 2 girls, 1 ass.
Rachel playfully spanked Jen's ass and gasped along with Jen, as both of them felt the slap, and the following rush of endorphins and pleasure that flooded their minds. "Holy hell, I felt that? How the fuck..." Rachel exclaimed in surprise as she lifted herself off of Jen's ass. The moment she broke contact, the pleasure stopped. She sat down again and the rest of the pleasure was felt again. "Oh wait, your odd way of speaking made us literally share an ass. When I sit on you, I actually connect to you, and we are really sharing 1 ass. Huh. Well, it is unexpected, but I actually think that I prefer it like this, it is a lot more fun." Rachel tried to move, but couldn't bounce. She just could feel the ass as if it were her own. Jen still had full control over it.
Rachel felt her legs wrapping around to Jen's front as she pushed the bottoms of her feet together, making her 2 half dicks merge together into one full, 6" long, nice and thick dick. She then lowered her feet down, sliding her dick into Jen's pussy, which then somehow sucked it in fully and trapped it inside.
The moment her dick entered Jen, both girls began to feel an ungodly amount of pleasure as both couldn't hold back their moans anymore. Since they were sharing an ass, that meant they shared nerves as well, so Rachel was feeling both her dick and Jen's pussy. Jen was feeling the same too. Feeling a pussy clamp down on a dick, that they also could feel with was causing both girls to nearly lose their minds with the intensity of the pleasure.
It only lasted a few minutes though. After 2 and a half minutes of this, they felt Rachel's cum begin flowing down her legs from her ovaries and into her heel dick; which began to pump out her actually massive cum load, as well as their pussy being filled up with the fresh load of jizz. They both then felt Jen's pussy contract from the bottom up right after that, and launched Rachel's dick out of it, along with most of the cum. Rachel's feet ended up being stuck in Jen's cleavage for a second before she was able to pull them out and split them apart. The second she did, her half dicks rotated downwards again, returning to being her dick-shaped heels.
Some cum still remained inside of Jen though, trapped in a special cum pouch deep within Jen's pussy. However, since it wasn't fertilized cum, due to Rachel not actually having testicles to produce sperm with even though she now has a dick. So Jen wouldn't become pregnant from this. But they both still could feel the slight bulge deep withing Jen's pussy.
"That was fucking incredible! I didn't know a person could feel that good." Said Rachel as she leaned back, resting on top of their shared ass.
"Hee hee! I glad you liked it. I enjoyed it too." giggled Jen.
Rachel slid off of their ass, and crawled into bed, fully exhausted now. Both girls were soon fast asleep, with Rachel inher bed, and Jen turned around at her waist, resting her head on top of her ass as she held on to it. This was how bouncerbutts usually slept, as their waists could rotate and turn over 270 degrees around without causing them any harm or lasting damage, or even stiffness or cramping. So laying on her stomach on top of her huge hiney, was actually very comfortable for Jen.