SNTJ-013 Cheating with the neighbor who is married

She wasn't angry at all, but she wanted me... Let's practice riding posture with her! The thing was that Shiina Sayuri was the other man's mistress, and he always criticized her poor sexual skills, especially horseback riding. Shiina Sayuri thought that for that reason, he was getting tired of her and came here less. She wants to improve her sexuality and help men feel even happier. And from then on, I became a tool for her to practice. I was only allowed to lie still and she rode on me. But over time, she seemed to be more accepting of me, no longer doing everything by herself but giving me the initiative, enjoying sexual pleasure together...