Hi Aurora, Welcome to Healing Well forum, we are happy to have you. I have a little story about this, when I was 18 I dated a guy for about a year. He was my "first love" and I did get close to his family, even though my mom didn’t care for him all that much. She says I am a "bum magnet"...lol! Anyway, we broke up as the relationship really wasn’t a very good and his family wasn’t aware of everything that was going on within it. His mom and my mom are best friends...weird huh? So, he goes on to get married a few years later and to this day his mother is always saying that he should of married me. She even says this to him...apparently she doesn’t care for his wife, even though they have been married for over 10 years and have 5 kids. Regardless of that, I can’t help but to feel sorry for the girl. She is caught in a situation with his mother competiting for her attention and affection and respect. As you said your son is 27 and more than able to make his own decisions regarding these matters. Unless he lives with you, then you really don’t know what goes on within their relationship. I am sure if he is considering terminating the relationship he must have some very good reasons for it, especially if she is as wonderful as you say. I do understand it is difficult when you have to adjust to new people coming into your life and your son's as well, but I am sure you can trust your son's decision and learn to love the person that he chooses to love as well.