Interesting you mention that, as just last evening she handed out a “punishment” to me along those lines. Her rule is that I’m not allowed to cum without her permission or not in her presence, but a week or two ago I did, and later told her. So as a kinky punishment she denied me an orgasm for over a week, and last night she let me cum on her tits, with the condition that I had to lick it all up afterwards. Not sure if I’d be willing to lick her clean from someone else’s cum though...?