Ash, the studious one, is struggling with her advanced math homework. Her stepbrother, always more hands-on, offers to help. As they sit together, his knee brushes hers, sending a jolt of electricity through her. She sees him glance at her cleavage, and she knows he's thinking about more than equations. She starts to tease him, slowly unbuttoning her blouse, letting him see her lacy bra. When he can't take it anymore, he pulls her onto his lap, his hard cock pressing against her. Their tutoring session turns into a lesson in raw, passionate lust.