With her parents engrossed in the TV downstairs, a curious and horny daughter sneaks into her brother's room. She finds him masturbating and, intrigued, decides to join in. She takes his cock in her mouth, sucking him until he's rock hard. Then, she straddles him, impaling herself on his massive erection. They fuck silently, their bodies moving together in a dance of desire as they listen to their parents' muffled voices below. He cums inside her just as they hear footsteps approaching, causing them to quickly separate and try to act innocent.