OP with my first ds I was in exactly the same situation...5.5 years on and another ds2 later I'll advise what I really wish I'd done then that would have saved me years of grief and honestly started the lead to the marriage breakup
You can't be fluffy or accommodating on this I promise you it has to be clear and now then you go to bed with the baby
"DH...right now you are personally destroying any hope of an amicable relationship between me and your parents, you are showing me how unimportant myself and dc are by being more concerned with your parents needs.
Your mother does not "help"and you know this so stop insulting my intelligence by trying to manipulate me...what you are doing is causing me huge pressure and fairness is not relevant when the health and mental health of your wife and child are in play.
You can now make the choice to be a decent father and husband because everything else as wonderful as it is does not exempt you and allow you to use us as a human shield to retain your parents conditional Iove or play in a system where our needs are sacrificed..
You can be a decent father and husband by supporting us ,not putting pressure on us and frankly accepting your parents needs are unimportant ,invalid and unacceptable when they did not birth this baby.
If you can stand up for us support an protect us to bond and live in a comfortable way it is likely I will be able to have a decent boundaries relationship with your parents
Do not negotiate on your parents behalf as it simply shows me you are more interested in their needs than mine and our child's and that we are less important
If you do not...leave "
I promise you OP all the back and forth and debate ends in heart break
Lay the boundary and stick to it