[Mosaic removed] My mother-in-law, Ayaka, suddenly became a new mother due to my father's remarriage. She was beautiful, bright, and had great style, and was too stimulating for me, a virgin. By chance, she found out that Ayaka was a slut in the past, and when she asked him to lose her virginity while sitting on the ground naked, she unexpectedly agreed, saying, ``It's only once.'' She intended to do it only once, but it felt so good that she fucked her over and over again, and gradually Ayaka's dormant slut instincts awakened, and she became a complete masturbator.