custom concept: big sis barges in your room only wearing a G-string. She gets upset when you start making fun of her bubble butt and persuades you to admit you LOVE her and her bubble butt. Slapping, squeezing and sucking on your little nut sack until you give in. She sucks your cock a little and then makes you fuck her doggy, bounces on your dick and lets you watch while she cums to finish it all off ;) watch a girl have a real orgasm and get trained to last longer. Win win ;)