After a couple's fight, my stepmother always comforts me.

Shortly after getting married, she was relocated to my wife's parents' house, and the three of them began living together with her stepmother, who was living alone. Thanks to my stepmother who kindly welcomed me, my smooth-sailing newlywed life began. However, in the third year of marriage, a period of boredom suddenly surrounds. My husband and wife erupt every day... Unable to see me as I was completely broken, my stepmother treated me kindly like a real mother. Every time I touched the warmth of my stepmother, who gently comforted me every time I pestered, I began to feel unfair desires...