You come to check out some books and see there is a new librarian, she scans your books and finds a hidden magazine you were trying to check out, "big booty girls" I tell you that you shouldn't have found that here, you go on to say that I probably have a flat ass, so I prove you wrong. I tease you with my ass in my skirt, bending over, before slowly lifting it and teasing you some more, I encourage you to jerk your cock over my big round ass. I eventually lift my skirt fully so I am shaking my ass in my thong right in your face, I tell you to cum all over my ass! (no cum shot). Looks like you won't be needing that magazine anymore ;)