In the dim light of their shared bedroom, a sister's eyes widen as she spots her brother's massive erection tenting his boxers. Unable to resist, she crawls onto the bed, her body rubbing against his as she reaches for his cock. He gasps as her small hand wraps around his thick shaft, and soon, they're lost in a heated make-out session, their hands exploring each other's bodies. She guides his cock to her soaking wet pussy, and with a moan, he pushes inside her, filling her completely. They fuck hard and fast, their bodies slapping together as they chase their release, their moans and cries filling the room until they finally collapse, spent and satisfied, in each other's arms.