Mercedes Mac is doing homework when her stepbrother Jason comes in. She asks if he wants to hang out later because there's a documentary that she wants to watch. Jason is a total dick to Mercedes, telling her to come find him when she learns how to suck dick.

The next week, Mercedes comes in to tell Jason that she watched some porn and learned with a cucumber. She's ready to suck it. Popping out her titties, she demands to see Jason's dick. He's only too happy to spring it free so Mercedes can show him her newfound BJ skills.

It's a foregone conclusion that Mercedes wants to fuck. She starts out in reverse cowgirl, then finds herself on her knees with Jason buried inside her. When Mercedes rolls onto her back, Jason makes sure she's having the best time possible as he finishes her off. Then Mercedes gets on her knees so her stepbro can bust a nut all over her big boobs.