Under the cloak of night, you sneak into your girlfriend's room, eager to fulfill your fantasy. She's asleep, but her naked body, bathed in moonlight, stirs you. You position yourself behind her, your throbbing cock pressing against her ass. She wakes, surprised but excited, and guides you in. You pound her mercilessly, her moans filling the room as she claws at the sheets. The thrill of the moment, the taboo of the situation, drives you both wild.