I'm a masseur, and my mother-in-law is surprisingly horny and eager to have sex! Under the guise of practicing massage techniques, I gradually start touching her everywhere. Targeting my sensitive spots, I aim for incest with my mother-in-law. Before becoming independent as a massage therapist, I ask her to be my practice partner. I give it my all during the session, but my strict mother-in-law keeps criticizing me. There's absolutely no erotic atmosphere. However, she says if I treat it seriously like a professional session, she'll allow it—leading me to a hotel room. Away from home, she surprisingly accepts a more sensual massage. At this point, sex seems possible! So I ask her again to be my practice partner at home. This time, my arousal builds steadily, and I successfully achieve incest with my mother-in-law!