I always felt a bit embarrassed to sit behind her while she was riding.The thing that I enjoyed was that I get to rub my cock against her ass while sh... was riding. She did have a boyfriend outside college and they were in a pretty serious relationship and he used to fuck her at least once in two weeks. One day something unusual happened, Mariya didn’t come to class and she messaged me asking me to come to the football ground after class. I went there and saw her with red eyes clearly indicating. As her flesh parted to accommodate the thickness of the intruder in her crack, the subtle pressure against me was astronomically splendid. Still leaning forward I unknowingly paused for several seconds as the throbbing flesh of my body worked itself slowly deeper and deeper into her cradle of erotic delight. She flexed her ass muscles several times and I almost lost it right then. "You like that, huh?" she teasingly asked as the flexing of her ass continued, driving me totally insane with. Master comes through the door and drops his brief case, he comes up to me and gives me a firm squeeze on the rump as I am finishing putting dishes away in the kitchen, then he goes into his office and turns on his computer and I think oh shit, I try to stop him before he turns on the screen to the pictures of girls being spanked, Master gets this grin on his face as he tells me to come here. I slowly walk over to master and he asks me what the hell is this shit! I just stand there looking. The first couple of beads were ok but as they got larger there stretched me more and more. There were 6 and by number 4 I was moaning. The fifth and sixth had me squealing. As much in pain as in pleasure. I was well and truly plugged.Satisfied with my reaction he went back a got one of vibrators that are used on your clit. He started it up and then he touched it on my clit I squealed and shook. “Oh yes you really are a dirty slut aren’t you” he hollered “now open wide for your Master” and when.