One night and two days of 1 night and left alone by my wife's sister who suddenly came over

Takashi is at a loss as his wife goes into a fight after a couple has returned to his parents' house. Then my sister-in-law Ayano came to visit me. "I heard, Takashi-san. Did you get into a fight with your husband? I'll help you make up." Ayano listens to her with kindness as a consultant, worrying about her younger sister and her husband's disagreement. Takashi is confused by Ayano's intense skinning touch, looking upwards and holding her hand, but she gets an erection...