In the basement, the stepbrother and stepsister find a sex box left by their parents. Curious, they open it to discover various sex toys, lube, and a note that says "Have fun, kids! LM". Excited, they undress each other, and start exploring the box's contents. The stepbrother slowly eats out his stepsister's wet pussy, while she teases him by playing with his huge cock. They use every toy on each other, fucking and sucking until they can't take it anymore. The stepbrother pulls out his hard cock and forcefully enters his stepsister, making her scream in pleasure. They fuck like animals, their moans and grunts filling the basement. As they cum together, the stepbrother shoots his thick, sticky load deep inside his stepsister, marking them as each other for life.
