During an adult summer-class role-play, Sumire, my wife’s younger sister, stays at our home and makes her crush on me impossible to miss. She escalates by climbing on top and shaking her round ass in reverse-NTR cowgirl sex. Sloppy tongue kisses muffle her moans as she pounds down hard and takes a forbidden creampie—even while my wife is cooking nearby or sleeping beside us. After simultaneous kissing and breeding sex, I can only apologize to my wife and ask her to wait a little longer for our first child.