Both our children are currently under the age of 2.
His side: My partner does not get along with my mum. He doesn't like traits in her personality and seems to think they will rub off on our children the more she is around them. He also has paranoia that she will tell them things that will disrespect him or turn them against him and doesn't find she supports us as a family/couple like his parents do. For example his parents buy the kids things all the time to help us out etc. He also doesn't feel acknowledged by her as a father and feels she tries to push him out of the picture. For example when I lived there temporarily she didn't want him in her house and that angered him as the kids are there and he felt inconvenienced to see them. He felt pushed out of the picture and felt she didn't care if he existed in the children's life or not. He is now trying to dictate that his parents should be in the kids life on a regular basis and my mum should only be entitled to seeinh the children 1-2 times a month for maximum two hours with my supervision.
My side: my mum doesn't speak badly to the kids about him. No one's perfect and everyone has bad traits here and there but doesn't mean to say just because they have that flaw it's going to be absorbed by the kids. I just find he's being paranoid and controlling and who is he to try and restrict and dictate when and how long we can spend time with my own mum. Throughout the relationship I have ignored him and seen her when I want with the kids but everytime I do, it ends up with us arguing and on the brink of splitting up. I'm sick of going through these arguments every single time. We've sat down time and time again to maturely discuss it and he just won't let any of it go.
Both of them have been in a room alone together to hash it out to see if we can get past things and it only made things worse. I feel so stuck in my position and feel like this is going to be a long-term stress that will never go away. I'm so torn about whether to stay in the relationship or not and even if it ends its still going to be a problem.