I have been in a similar situation, well, not quite similar, but one that also involved moms.
My then fiancé wanted to get married and have kids and that seemed perfectly fine for me, but in the 3 years that we were in a relationship never did he want to introduce me to his family and friends. That felt like a punch in my stomach because of everything I had done for him and all my time and efforts invested in this relationship. I know it may seem selfish but I wanted him to acknowledge me to his family for all I did, and I thought I had earned it. But the furthest I could go was getting to meet his dog. He only took me to his house twice and I only meet his dogs. He said his family didn’t have a healthy relatioship and they were always arguing. I know the real problem was his mother, so I told him he could at least introduce me to his sister, cousins, aunt or uncle… I just wanted to be known by any of them. Turns out he felt push against the wall and bailed out on me.
I know he has his heart in the right place but he could not stand up for me or our relationship and I still miss him, but I know I deserve better.