After his horny older dad told him he'd better help his horny little stepsister out of her boring life by going to college and getting a real education, Horny Step Son Helps his Mom by taking care of her, providing plenty of cash for food, clothes, and gas, while Mom deals with the stress of trying to raise a family on her own. Unfortunately, things don't go so well. As you might expect, things don't go so well. But luckily for Horny Step Son, his sexy stepsisters have more than just money to throw at the family dog, they've got brains as well!.