Bursting with secret desire, a sister sneaks into her brother's room, finding him asleep, his cock tenting his shorts. She can't resist, her fingers hooking into the waistband, pulling it down to reveal his thick, throbbing member. She strokes it, feeling it grow even harder in her hand, before she leans down, her tongue flicking out to taste him. She takes him into her mouth, gagging slightly at first, but soon finding a rhythm, her head bobbing up and down as she sucks her brother's cock.