A while back, my brother married a woman who had a son named Billy. A year later, my sister-in-law gave birth to a little girl. Two years later, she gave birth to a boy. Billy, who was 14 at this time, was treated like an outsider. My sister-in-law and brother saw him as a burden who spoiled their picture-perfect family. If you asked my sister-in-law how many kids she had, she would say two. Billy started acting out. He got involved with a bad group of kids and started getting in trouble. He started failing all of his classes and eventually ended up getting into drugs and was suspended from school. My brother and sister-in-law were fed up with him. I asked my brother if Billy could spend the summer with me and my husband. We have a hobby farm and I thought maybe getting away from his life for a little could help him some. Well, they were more than happy to get rid of him. It was kind of rough for the first few weeks. He had a lot of anger issues, but my husband kept his hand in mine busy doing work on the farm. And we both made sure he knew he was loved and wanted. By August, he was a totally different kid. He wanted to keep living with us, but my sister-in-law insisted that he came back home. After two months, he went back to his old ways due to his parents and difference. They ended up sending him back to us and he lived with us throughout high school. He ended up being an AB student and kept up with a really great group of kids. He got involved in baseball and got a scholarship to a local university. He's older now and in his last year of school, he's engaged to a really great girl. When he was younger, he started calling me mom and he started calling my husband pops. He never really had much to do with his mom and had nothing to do with my brother. He saw them on holidays and when the family came over. His mom tried to have a relationship in the past few years, but he has avoided her. On Christmas, my sister-in-law was over and for whatever reason, she opened my desk door and found a birthday card from Billy where he said to the best mom ever, thanks for loving me and giving me a chance. She was devastated. She ended up texting Billy, confronting him and asked if she would be present as a mother and groom at his wedding. He told her that he would no longer consider her as a mom and wasn't even sure if he wanted her at the wedding at all. My sister-in-law is now insisting that I make it clear to Billy that I am not his mother and that he is not to refer to me as such. My brother is very upset with me. Even my parents are questioning me to do what my sister-in-law wants for the sake of peace. Honestly, I consider Billy to be my son. I count him in with all my children. I feel like telling Billy not to present me as his mother and groom could possibly be misinterpreted as me saying I don't feel like he's my son and I don't want to take a chance on that happening. If he decides to present his real mom as his mother of the groom, I will 110% support him.