A Risky Public scene of Solo Masturbation in a Changing Room

She's in a public changing room, looks like a store or gym. Starts off just checking herself out in the mirror, then her hand drifts down. It's a quick, furtive scene of masturbation. She's listening for anyone coming, which adds to the thrill of doing this in public. Fingers work under her clothes, trying to be quiet. Camera stays close on her face and her hand moving. She gets herself off, bites her lip to stay silent, and then tries to act normal like nothing happened. The whole point is the risk of getting caught while touching herself in an open, public area.