Two siblings, bound by blood and forbidden desire, find themselves alone in the house. The sister, a curious vixen, leads the way, teasing her brother with her lithe body and sultry glances. She slips into the bathroom, inviting him with a sideways glance. He watches, hidden, as she undresses and steps into the shower, the steam caressing her curves. She reaches for the soap, lathering up, and begins to wash herself, her fingers lingering on her nipples, her pussy. He can't resist any longer, stepping in behind her, his hard cock pressing into her ass as he whispers, "Let's play."