[Kamiya Ogawa] Aniyome to Ore to Shuumatsu ni (Kanojo ga Ochite Netorarete)

Sakura, a voluptuous sister-in-law with enormous breasts and nothing but a ruffled apron, spends her weekend wrapped around her husband's little brother Kou, a blushing virgin who can hardly believe how perfectly he fits inside her. Between shopping plans, shared baths, and lazy mornings that keep dissolving into sex, she worships his big penis and coaxes his confidence out of him while the guilt of cheating on her husband Yuichi never quite slows her down. By the time the weekend ends, their secret has already hardened into a weekly arrangement she teasingly refuses to give up.