In the living room you see a bowl of jelly beans. What suprises you is the 16 year old girl asleep on your couch. Even wierder was that she was wearing a sexier version of the clothes your little brother had been wearing. To see what happened you picked up a pink jelly bean with the letter G on it. You eat it and right when you do there is a tugging on your groin as your dick receeds into you and forms a vagina and clitorius.
Your hands immediately move to your groin, pressing against your shorts and feeling the strange lack of external equipment there. As you stare at your brother - now your sister - you realize she must have eaten enough jellybeans to completely change her body and clothes into their current state. You start to reach for the correct jellybeans to change both of you back, but then you pause. Do you really want to just go back to normal?