I was invited to my girlfriend's house for the first time, whom I'd been dating for six months. Her mother, Maki, welcomed me. Seeing her attractive suit and her outstanding style, I was overcome with tension and excitement, forgetting about her. Maki is an insurance salesperson, and while she was trying to sell me insurance, she asked me, "Are you thinking about your future, Miyoshi-kun?", interspersed with body touches. I was seduced by her adult sex appeal and my crotch was rock hard, but Maki noticed me and gave me a finger job to make me feel better without her knowing. After that, Maki called me out whenever there was an opportunity, and we started to meet up without her knowing...