My wife's younger sister Nonoka is irresistibly cute, and her voice is exactly my type, so we begin an affair. She loves stealing another woman's man and waits until my wife is asleep before seducing me. We both hold back our moans, but Nonoka rides so violently that the wet slapping of sex fills the room and threatens to expose us. Getting caught would mean instant divorce, yet riding her while whispering filthy words into her ear feels too good to stop—and I start wishing I had married Nonoka instead.