The stepfather and stepmother still make love every night, and the incredible piston-like sounds coming from the next room... finally drive the unsatisfied wife, who is already dripping with lust, to a frenzied, impulsive thrusting with the skilled penis. (miru SNOS-452)

My husband failed at work, and to pay off our debts, we moved to my adoptive father's house in the countryside to live together. I didn't have a good impression of my adoptive father, a chauvinistic man from the Showa era. But honestly, the sounds of our passionate lovemaking that filled the house every night were quite enviable. My adoptive father still maintained a regular sex life, while my husband and I were experiencing sexual deprivation. My husband always said he was too busy with work, leaving me constantly sexually frustrated. Gradually, I started masturbating alone, amidst the sounds of thrusting coming from my adoptive father's room. My adoptive father noticed my state until the next day at noon. In the sweltering heat of summer, after finishing chores, I was restless and unconsciously reached for my genitals, only to be caught by my adoptive father. "You're sexually frustrated, aren't you? I know." That's where it all started. Although I verbally refused, my body honestly responded. Faced with that erect, powerfully erect penis, as intense as someone in puberty, I let out an "ah-hee" sound, losing all sense of chastity and convulsing. My husband always finished quickly during sex, but my stepfather was completely different. He took me to a level of pleasure my husband had never experienced, making me ejaculate a large amount of fluid that I wouldn't normally produce. I couldn't hold back anymore. From then on, every night when I heard my stepfather and stepmother making love, my vagina would become incredibly itchy and wet. I'm sorry, I cheated on him.