My girlfriend's mom is a-certified MILF, her body a work of art. Her ass, in particular, is a thing of beauty, plump and perfect. I can't keep my eyes off it, and she knows it. She teases me, bending over, giving me a glimpse of her thong. My cock is rock hard, straining against my jeans. She turns around, her eyes locked onto my bulge, licking her lips in anticipation.