Try the other bedroom
From Create Your Own Story
Something makes you decide to enter the other bedroom. Maybe it was the little bit of booze you had earlier. You never handled your drinks well. Instead of passing out like your boyfriend, though, you tended to make otherwise insane choices.
You grab the nob and slowly open the door. It is pitch black in this room. The curtains seem to be closed and no light was turned on. But you can hear noises coming from the center where you imagine the bed would be. "Ooo, yes! You are so big!" It was a girl's voice. She certainly sounded like she was getting plowed.
Your wetness grows instantly from this as you imagine yourself as that girl. No clue who the guy was, but you did not care. You wanted so badly to be in that bed with him between your legs, thrusting, pounding away. "Harder, harder!" She screamed, no doubt nearing her climax.
This went on for a few minutes more before the girl screamed at the top of her lungs and apparently collapsed, exhausted. Just then, you heard something that made your heart skip a beat.
"Are you going to join us, or just keep standing there?"
It suddenly dawned on you that while there was no light in the room, the hallway did have light. With the door open, the hall's light had revealed you as a silhouette. They might not know who you are anymore than you know them--though that voice was vaguely familiar--but they knew you were there.
What do you do now?