A mother targeted by her son's best friend

I loved Shinya's mother, Ririko. He looked after me without my mother, and I thought I was a real mother. "Until that day... 'I shoplifted at a convenience store with Shinya and was caught by the store clerk, and since I'm not in my parents, I was in trouble because no one asked for help. And Ririko rushed over to me, but she protected her son, Shinya, and took all the responsibility into me... I don't believe anyone anymore, I'll turn Ririko into a meat toy!!