Tight on accommodation, a stepbrother and sister share a bed on vacation. Fearful of the dark, she clings to him, her warm breath on his neck. Unbeknownst to her, his erection tents the blanket. As he tries to sleep, she shifts, her ass rubbing against his cock. He can't help but thrust, and soon, his cum soaks her panties, a sticky surprise for her in the morning.