Even though he's still growing, his sister wanders around defenselessly half-naked, and he can't help but get excited! He can't stand staring at her breasts and ass everywhere! He finally makes a move on his sister, who is napping with her body exposed, but her pussy is soaking wet! He pretends to be asleep and waits for his dick, and has an incestuous fuck with his sister who is so active in sex that he can't stop!