Drew gasped at the view he saw down below. Ashley, his older sister, was spread completely naked on one of the lounge chairs below! Standing naked as he was, he quickly stirred to arousal, his hand squeezing his balls and jerking his cock as he watches her. Then she roles over onto her back, spreading herself unknowingly wide. His eyes widen as he catches a view of her snatch, hand starting to slide faster and faster along his cock. Perhaps she didn't know anyone was home? She was certainly hot, he thought, ignoring the fact that she was his sister. He eagerly began wanking off, the fact his door was wide open having been forgotten due to the sight he saw below.