Step-Mommy is having hot flashes and needs to cool off so she exposes her belly. step-Son gets excited by what he sees. She asks him whats wrong. He says he has a belly fetish. In that case, she asks to use his cum because she hears it's good for stretchmarks. Of course, their family so they can't have sex so she lets him rub his dick on her belly until he cums on it.