Well done OP.
You need to answer any statements about her being "so upset" with "you need to go and visit your mother on your down time", on a loop.
She is not your mother and not your responsibility to keep happy.
Lots of selfish men do this, push THEIR responsibility towards their parents onto the people pleaser wife they DELIBERATELY chose to marry.
Selfish men always marry a type that they know they can manipulate and bully into putting them and their needs first.
I bet he won't go at the weekend but he thinks its ok to bully you into spending your precious time with his mother?
Not on.
Spell it out to him and talk about him and his mother causing you upset and stress.
This is going to be your life, if you don't push back and show him that you will not be bullied.
Selfish men only get it when their wives tell them they aren't happy, their feelings are changing because they are so selfish, they are thinking it might be easier going it alone without the stress of them and their selfishness...........
Selfish men only change and buck up because of self interest and not wanting things to change for them.
Unless you are very firm and show him you have steel, you will have your life ruined by him and his mother.
The cheek of your husband, having had a nervous breakdown which you helped him through to be putting you through this stressful bullshit with his mother.
You sound like such a great woman, you deserve so much better than this.
Know your value and treasure this precious life you have.
His awful mother is nothing to you and your child, so push back hard OR be swallowed up by both of them and their selfishness.
Think about packing up and going to stay with your mother for some "space to think" if he refuses to get it.
Returning to work is stressful enough without this.
I doubt he'll be doing much to help with the baby when you go back to work?
Make sure you don't get caught for cooking a meal every night on top of everything else.
With both of you working it makes sense to feed yourselves.
Having to cook is not a responsibility you need at the end of a long day and then having a baby to look after.