I come back to my University Professors room because I've forgotten some books and I catch him masturbating over my topless modelling photos. I tell him it's fine because I have a crush on him anyway, and I let him take some of his own pics of my tits. Then I let him take some pics of me sucking his big cock, and ask him to promise not to tell my boyfriend. Finally I give him a tit wank and then reapply my lipstick and let him cum in my mouth.