The story in undertale porn comics is about ordinary family. It was Sunday morning, mother prepared breakfast for husband and children. By the way she was very hot sweety woman despite the age. This morning Jacob, her son, and his sister were supposed to go to church, but they missed it. At lunch time mom came into their room with food but saw how kids were making the sex. Guy splashed sperma upon big sister’s tits. The scandal happened, but at night mother came again to check her boy and have a discussion with him. Entering she noticed Jacob masturbating on her bra. Son couldn’t resist any more and made a wonderful titsjob with mom!