Two curious teens, siblings by blood, find themselves alone in the house, their parents away for the weekend. Boredom turns to curiosity as they explore each other's bodies, tentatively at first, then with growing intensity. The boy's hands roam over his sister's petite frame, cupping her small breasts and feeling her quiver. She reaches down, wrapping her fingers around his hardening cock, gasping at its size. They kiss, tentatively at first, then with growing hunger, their tongues exploring each other's mouths as they strip each other naked. Their bodies pressed together, they grind, the boy's cock sliding between his sister's legs, rubbing against her wet pussy. They're both virgins, learning each other's bodies, their moans filling the empty house as they edge closer to their first time.