Tiffany Rouso is concerned when she catches her new stepson in her daughter's room late one night. She takes a closer look and is shocked to find him jerking off to the sight of the new sister sleeping. Taking a closer look, she finds that his cock is very big and hard as a rock. To her surprise, the entire thing is making her more horny than angry. She decides that she just has to have some of that big young cock. Telling him to relax, she slides over close to son and strokes his cock. He is worried that he is in trouble, but she assures him that she only wants to help him with that big cock. With daughter sleeping just inches away, Tiffany takes his meat into her mouth and hungrily sucks him to the root. He is shocked when the hot blonde mom takes his dick from her mouth, turns around, and instructs him to put it into her wet pussy. The idea of fucking the son with the daughter in bed sleeping is too much and she starts to cum loudly on his thrusting shaft. He loses control and shoots a big load into her horny pussy. Their loud banging wakes daughter up. She sees everything. Tiffany is afraid the daughter might tell her new stepfather, but she promises to keep it a secret, so long as she gets some of big brother's big cock as well.