Bored and annoyed, a curvy sister with a big booty finds herself alone with her brother. As she fingers her wet pussy and strokes her ample ass, he catches her in the bathroom. Heated words ensue, but they soon find themselves masturbating openly in front of each other. The sister's lust grows as she takes in her brother's thick, straight cock, fantasizing about it plunging into her tight cunt. Their moment is cut short, however, by an unexpected intruder.