Pencil skirt hiked up, panties shoved aside. One hand grips the armrest, the other clutches the desk edge. Purple bullet vibrator buzzes between her thighs, hidden from view. Back arches, hips jerk upward. Office chair rolls slightly with each involuntary thrust. Moans muffled behind a closed door. No one walks in — but if they did, they'd see only a trembling leg and a skirt that won't stay down.