A young wife is worried about her figure, wondering if her butt has started to sag a little lately. Meanwhile, her stepson is really obsessed with his stepmother's big ass. One day, his stepmother buys some shapewear from an online store, rumored to be effective for making her butt look beautiful. When she picks it up, she notices a hole in the butt area! But she tells herself that it's because the design is supposed to be effective, so it can't be helped, and when she tries it on, it's really tight and uncomfortable... To be honest, it puts pressure on her pussy, and it stimulates her clitoris, which is crazy... While she fidgets, wondering what to do, her stepson sees her! He asks her to help him take it off, but it has the opposite effect, and she ends up feeling more and more aroused. Seeing his sexy stepmother's ass getting turned on, the stepson also gets turned on, and the atmosphere becomes awkward... In the end, the stepmother and stepson end up having sex impulsively. Who would have thought that the underwear she bought to make her butt look beautiful would actually make her aroused...