Since marrying, my relationship with my wife has become ordinary, for better or worse—definitely trending toward routine. Then one day, my stepmother, Naho, came to visit from out of town. Unlike my wife, she exudes mature charm, radiating warmth and kindness, with big breasts, a stunning figure, and a prominent cleavage that catches the eye. Just accidental touches or casual words from her make my heart race, sparking uncontrollable fantasies. Seeing her wrapped only in a bath towel after a shower pushes my helpless desire as a weak-willed son-in-law to the limit. Tonight, I’ve decided to secretly spend the night with her.