JUL-570 Twice a week, I forget the age difference and have intense in-and-out slow sex with my extraordinarily potent stepfather, hiding it from my husband. Ai Murai

Two years into our marriage, I now live with my husband and his parents—four of us in total. Compared to when we first got married, the relationship between my husband and me has cooled off, and our nightlife is non-existent. In contrast, my in-laws have their conjugal time every Wednesday and Saturday night. Since finding out about this, I've been unable to stop myself from peeking at them, even though I know I shouldn't listen. One day, while this lifestyle continued, my father-in-law pointed out that I had been watching him and his wife, and he even saw through my frustration...