Hiding from her parents, I've been teasing my shy stepsister's nipples every day! At first she hated it, but lately she's become super sensitive and prone to premature ejaculation, and she's cumming over and over again with a lewd look on her face! At this point, she's become my personal flesh toilet! Her desires aren't satisfied by just her nipples, so I'll eventually level up to penetration! My stepsister is drooling from all the teasing, and her pussy juices are dripping, so she cums even with just a light penetration! If I shake my hips in earnest, she'll go crazy and cum like crazy! This is the result of training her until her whole body becomes an erogenous zone!