My wife came home late every day, which made me suspicious, but the person at the door brought tears to my eyes

(From a reader submission, the images in this article are from the internet)
My wife comes home very late every day, I am suspicious, a person appeared at the door, and tears welled up in my eyes
My wife has been coming home very late every day recently, which is quite unusual, and it caught my attention. I went to her company to investigate, and her colleagues all said there had been no overtime recently, everyone left at the normal time, so what exactly was she doing? This kind of thing inevitably made me think. Just as I was full of suspicion and doubt, a person appeared at the door, and at that moment tears welled up in my eyes.
When I talk about my childhood, it is full of tears. My father died early, when I was not yet 10 years old. Normally in such a situation, one's mother should give even more love and care, but my mother directly abandoned me and left, leaving me alone in my father's house. After that, my elderly grandparents raised me through a lot of hardship. Because of this, even after many years, I am still full of resentment, and I do not want to mention or see this woman again at all.
Originally there was no contact between us. To me, my mother had almost died together with my father, at least that is what I thought in my heart. I only knew that after she left our family, it was not long before she remarried, and after that I could not be bothered to ask how she was doing. Because of this woman's cruelty, at that time I lost trust in family, and became a radical person lacking a sense of security. It was not until I grew up and met my wife that I felt there was another kind of woman in this world who could be so pure and beautiful, and that was what led me into marriage.
After I got married, my mother suddenly appeared and begged for my forgiveness. Her current husband has already passed away, and she never had any more children after that. The son and daughter from the previous wife of that family both treated her badly, and she could not go on living in that family, so she moved out on her own. Although her situation seemed pitiful, whenever I thought of what happened back then, I held a grudge and refused to forgive her. My mother's appearance already annoyed me endlessly, but what added fuel to the fire was that my wife had also been coming home very late recently. Whenever I asked, she hemmed and hawed and could not speak clearly, which inevitably made me suspicious. That day, she did not return for a long time, and no one answered when I called. It was not until almost 11 at night that she finally came back. I was so angry that I started an argument with her, and the two of us quarreled fiercely.
At that very moment, someone suddenly knocked on our front door. I opened it angrily, and it turned out to be my mother. Only then did I learn that recently my wife had been taking care of my mother. She often went to see the old woman and spend time with her, and her phone had been left at her home. She knew about my complicated feelings toward my mother, but she was even more afraid that I would regret it later, so she wanted to fulfill filial duty on my behalf. My mother felt lucky that I had found such a good daughter-in-law, and she said that even if I did not forgive her, she would be content. My eyes also became moist. It was my wife who taught me what consideration means, and what love and marriage mean, and these were things my parents had failed to understand back then. I still hate my mother a little now, but I no longer reject her, because no matter what, she carried me for ten months and gave birth to me. But can someone tell me how I should get along with her?