I have a girlfriend that I adore. And both she and I are very normal people. I'm not interested in anything perverted, and I just wanted to have normal sex... but then her older sister showed up, and my sexual desires started to become warped and crazy! My older sister loves cleaning, and her unconscious, defenseless, see-through ass, and her out-of-the-ordinary big ass, and even her thong digging into that big ass, and finally the excitement of having sex next to her even though she's nearby. Everything is so fresh and addictive! I want to bury my face in that see-through ass more, be pressed down on me, and die and cum as soon as possible!! I want to push her thong aside, insert my penis, and be crushed by her entire weight! Ah... today I'm going to have an affair again to satisfy my twisted sexual desires...