A sister's innocent curiosity turns into a heated desire as she discovers her brother's big, pulsing cock. She watches, hidden, as he pleasures himself, her own body responding to the sight. She can't help but touch herself, her fingers slipping into her wet panties, rubbing her clit as she imagines his cock filling her. When he catches her, she's ready, her body aching for his touch, her mouth hungry for his cock.