Living in my wife's parents' house, I'm leading the life of a typical son-in-law. Though my wife puts up with it, it's really because of my kind mother-in-law, Noriko, that I'm able to get through each day. She has a soft, plump figure and a refined, beautiful appearance. Lately, I can't help but be drawn to her. When my father-in-law jokingly told me, "Don't you dare lay a hand on her," I panicked as if my secret had been exposed, though I forced a laugh to cover it up. At night, when Noriko goes to take a bath, I sneak into the bathroom right after her. There, I catch her pleasuring herself—almost as if she's putting on a show for me. Unable to hold back, I burst through the door and pull her into my arms. As she resists, I confess, "I saw everything... I can't take it anymore." She hesitates, then finally gives in, whispering, "Just this once," before taking me into her mouth and hand. The next day, while the rest of the family is out, I return home and catch her alone. Startling her, I begin caressing her over her clothes. Ignoring her protests, I undress her and touch her groin—her panties already soaked with arousal. Though she pretends to resist, her body reacts sensitively, and I thrust my cock deep inside her. I continue thrusting, savoring her approaching climax, until I explode inside her with a creampie. Afterward, I bring my dripping cock to her lips. She looks slightly troubled, yet can't hide her pleasure as she sucks the fluids from me.