My beloved mother-in-law, who brought me up with a girl, was taken to the lowest friend

Reiko isn't the real mother. It is Reiko who her father remarried and became a new mother in her school days. After I got married and my father passed away, he brought me up like a real mother. I lived in love with Reiko every day. I wanted to make Reiko happy for my father. Get close to me without interest, and extend my hand to Reiko.