I was invited to the house of my girlfriend, who I had been dating for half a year, for the first time. My girlfriend's mother, Ryo-san, came to greet me. Seeing her in an attractive suit with outstanding style, I was filled with tension and excitement. Ryo was an insurance salesman, and he asked me, ``Shinji-kun, are you thinking about the future, too?'' and was trying to solicit insurance from me, interspersed with body touching. I fell into the sex appeal of an adult and my crotch became hard, but Ryo-san noticed me and gave me a finger job to make me feel better without letting her know. From then on, Ryo-san would call me every now and then, and we would meet again and again without telling her...