The Curious Roommate in the Bathtub

The hot water of the bathtub envelops your body as your hand does its work. Just as you're about to climax, the door creaks softly. 'Damn, I thought you were out,' murmurs a familiar voice. It's Lina, your 26-year-old roommate, standing in the doorway with her arms crossed. Her gaze shamelessly drifts to your hand and then to your face. 'I’m not interrupting, am I?'