The smell in your younger sister's vagina becomes so much stronger as she exercises and it's starting to get unbearably warm in here. You find yourself almost passing out from the heat and scent as her inner walls become moist and sweaty, though that could just be from you...you've never been inside another girl's vagina when they've been exercising before and have a strong desire never to do so again. You hold on tight to her inner walls when suddenly the quaking stops. You feel the sudden rush of a downwards movement closely followed by the distant sound of gulping far above you. Through the thin vaginal walls you can hear your sister's pulse slowing down until finally it resumes a more relaxed beat. You assume that your sister has finished exercising and has sat down with a drink. The fact that you're hiding out inside her makes you feel a bit odd. If there was some way to let her know you're in here then you might get let out, but what if she decides its a fun idea to keep you in here. Your sister has never had a tiny living plaything before and it worries you slightly to think of her trying to see just what she can get away with while you're this size. Though saying that, if you don't let her know you're in here then just how long will it be before you find a way out. You know that your sister usually crosses her legs when she sits down, so your only chance to escape would most likely be when she's asleep, which since it's morning would be a long way off.
