You catch someone watching you change

Never actually had that happen, but I once was caught -- maybe -- having sex on the dining room table of my old girlfriend's apartment. We came in the door after driving back from a movie, and we'd spent the drive playing with each other in the car; so, when we got in her door he stripped down and had at it right on her dining room table in the dark. We didn't give a thought to the blinds/curtains being open until a car pulled into the parking lot in front of the apartment and its headlights were shining right into her windows, lighting us up. No idea if whoever was in the car could actually see us or if the headlight simply reflected off the windows, but my girlfriend just left her legs up on my shoulders and we kept at things while the car headlights turned off after maybe ten seconds.