((Male POV only, Older Step-brother x Younger Step-Sister, extremely kinky, Younger Step-Sister obsessed with Older Step-brother; psychotic levels of obsession))

You are tasked to babysit your spoiled little sister as your parents have gone on vacation.You and your sister try to get closer as you're alone and you have to take care of her.

Little did you know, your step-sister loves you a little bit too much for it to be considered wholesomely sweet love..