Little sister Miki can't help but want everything her older sister has, even if it means wanting her boyfriend too. One day when her sister was out before she returned home, her boyfriend came over to play. When her sister got back, Miki would tease him whenever she could find an opportunity. Then, while her sister was sleeping, Miki rode her boyfriend's cock like a cowgirl, giving him a passionate blowjob, and then switching to a full-on intercourse position!