Your girlfriend Jenny Jekyll invites you over for a special treat but you are unaware what it is! You are then greeted by a new girl who claims she is your girlfriend's roommate and her name is Nixlynka Hyde. She expresses how cute you are and how Jenny wasn't lying. Her giddy demeanor and carefree sexual attitude is NOTHING like your girlfriend's and you are getting TURNED ON by her. She his everything you want in a woman - short, thick, with a huge fat fucking ass. She bends over and teases you and promises Jenny will not mind but you want to stay loyal. Nixlynka then explains how it will not be cheating because she is in fact Jenny! Jenny is a secret scientist and was developing a potion to make her your dream girl so you would never leave her and became Nixlynka. To prove it she offers to take it again and transform back into Jenny but she never tried the reverse potion and instead of it transforming her back she grows an even bigger ass. Her ass expands rapidly and each new growth phase makes her hornier like a dog in heat and more ravenous for sex and for the ass expansion. She wants her ass to be ginormous and teases you with her new expanding ass. She wants to be taken care of by you. Your dick is very pleased with your new girlfriend and continues to watch her ass grow and her struggle into a whole new 20 larger pants sizes. Lots of dirty talk. You will never leave her now