My stepsister has always been complexed about her big butt. But I love big, round butts! So I encouraged her by saying, "Most women are worried about having small butts," and the next day she started wearing tight pants that emphasized her huge butt! My stepsister came to show off her ass in a miniskirt and thong. Unable to hold back, I groped her ass non-stop! Full erection! Then my stepsister got excited and begged for penetration! I pulled aside her thong and inserted from behind; it felt so good that I immediately released inside her! We were both so excited that we did it multiple times and came inside her each time!
