Gorgeous Mackenzie Mace is super smart, and she is very serious about keeping her GPA up. So, when her report card gets in, she is sure she has a higher average than her dummy of a stepbrother. They make a bet, and if he has a higher average than her, she has to suck his dick. As it turns out, he does! Mackenzie sucks and slobbers on his cock, and he busts a load on her tongue. Later, Mackenzie has to give a speech for her graduation. To help her relax, her stepbrother bones her tight young pussy! A couple days later, Mackenzie wants to give her bro a send off before he leaves for college. She fucks him one more time, sliding her twat up and down on his dong! What a way to say goodbye…