Her arse

What had ended up swapping, without Rebecca’s knowledge, was their arses. Rebecca now had a perfect arse, one that would jiggle and swap and wobble with each step and movement she took. She looked amazing, and you had to be careful not to let on about the change. You didnt want her getting either insecure about it, or wanting to reset it. Her relatively tight jeans were now even tighter, and your eyes nearly popped out your head as you watched her turn around to put the last of your items into a suitcase.

“All is good with the remote” you said, “Nothing seemed to happen.”

“Well” she said, “We wouldnt know if anything did happen. Never mind.”

“Fair point. But come over here, I want to target them before they leave.” you pointed out the window to a couple walking past. when Rebecca touched the remote and you fired, they swapped genders. The guy lost a foot off his height and grew some modest breasts and a cute arse, becoming a cute girl, while the girl put on a load of weight, gained a load of height, and ended up becoming an average male. It was a pity, she was quite cute beforehand.

“That was interesting” Rebecca said.

The rest of the evening was boring. You didnt use the remote, and you just packed, before both simply falling asleep.