Ashley went and tied the rope around Alice and said "Jump. I'm sure you'll get younger and lighter and ill probably get older and heavier. It'll work out!" Alice nodded. They got set up with Alice about ready to jump and grab the key and Ashley went and was gripping the sign really hard just in case she was wrong.
Alice said "1,2,3 here I go!" and jumped into the pit. thanks to that change from the carnival game Ashley's original body didn't just get sexier but got older to about 25. as she raced towards the bottom of the pit she got younger rapidly as she approached 12 or half of her age (rounded down) with her clothes getting looser and looser on her body.
Ashley on the other hand had a different problem. Her body was about 4 and all those 13 years that had left Alice needed to go somewhere and the rope were guiding those years to her. She grew to about 5'4'' and as she approached 17 she matured with her hips and butt filling out, her waist remaining small, and her breasts expanded to F-cups. This left her little dress to barely cover her ample breasts.
When Alice reached the bottom she grabbed the key and all the force going downwards flung her clothes off her barely developing body. She went back up but both remained the same. When Alice caught her balance and both were on their feet they looked at each other and themselves.
Ashley joked "You look like I did when I was your age... except I think you chest and cute little butt were a bit bigger."
Alice asked with a flush face "can I get my body back?"