This has happened before with my wife also, sometimes spontaneously, sometimes as a kind of game we play. We would go to bars together, but enter separatley so no one would know we were a couple. I would sit a bit away from her and watch as men approached her, especially black men, singly, or sometimes 2 or 3. She'd flirt and dance, their hands roaming over her, groping her ass, even sliding up under her short dress or skirt. Under the right circumstances she would go out to the parking lot, returning later a bit dishevelled, frequently minus her bra and panties.