Asahina Shizue

Her husband is the man who the protagonist's wife engaged in an affair with. She tries to kill the protagonist out of anger, but soon starts living together with the protagonist, his mother-in-law, and his aunt.

She is pressured by her in-laws to get pregnant, and since she's failed to do so, she gets routinely scorned by them. Because of that, she never enjoyed sex with her husband.