Yes, he did stop to answer it. He always answers it no matter what he is doing. We have been on date nights and she will start conversations with him (like where are the Xmas lights - even though brothers are home!) and he feels obliged to drop everything to answer. He isn't this conscientious about responding to anyone else. Even when he's home and talking to me on the phone in his room, I will hear her knock and call him for dinner. Even though they rarely eat together as a family. At least he admitted that this pissed him off too. Not pissed off enough to ever say anything to her.
I reminded myself of all this and have ended it. We were both very sad but he understood why I was tired with having no privacy in my relationship from his mum, and how unwelcome I've been made to feel. I couldn't cohabit with him and deal with this stress every day. He agreed he needed to be strong with boundaries and he needs to stop being so dependent on her. And seemed to think him moving out and having physical distance would solve all the problems. I had to point out he's only moving down the road and also it's a problem when he is at mine, away from her, anyway. It's his way of dealing with conflict though, never do anything, just hope time will solve problems magically.
He really wanted to fix things and make it work and I know he's devastated. But I also feel this situation isn't as easy to fix as he thinks. 38 years of ingrained behaviour for both of them. If I was late 20s I wouldn't mind giving it time, but I'm 36 and want kids soon. I can't just wait years for someone to get to a place where they aren't running every decision past their mum. He already thinks she won't be supportive of us moving in (even though he'd do it anyway) and that if we get married, we should elope to avoid any awkwardness. But all this seems so stressful and it's before kids! My own parents are so welcoming of my partners, and even in my marriage I had a great relationship with my exILs. This is just a very alien way of life to me - to not want your son to have his own life.
It sucks so much to end a relationship because of 3rd party interference. I feel so disappointed with him for not listening to me sooner and trying to separate himself.
I know it's the right decision to avoid a long, difficult life together. But it still feels crap. The thought of having to date again also feels exhausting 