My step-sister and I have a sexual desire, stealing my wife's eyes just before giving birth...

His husband Kazuhiro is forced to follow his parents' house after his wife Mayu's birth. It's been a while since Mayu's pregnancy, and as she spends a sleepless night, she is excited by the sexyness of her sister-in-law Meguri, whom she has met for the first time in a while... By chance, she encounters her masturbating and enjoys pleasure. The next morning, Kazuhiro indulges alone, remembering her lewd behavior. Seeing this, Guri can't contain the lust that swells from her daily frustration, and as she instinctively slurps his cock...