Imagine a few years down the line.
You have your first DC.
She completely ignores you, takes DC out of what they are wearing and puts them in what she has brought.
She ignores your feeding/sleeping what ever routine.
She weans your DC when you have decided not to until X for reasons.
She buys stuff for your DC and gets rid of yours.
This carries on and on.
You buy a house.
She moves your stuff around.
Redecorates when you are away (don't laugh there are threads on here!).
You get married.
She decides she wants x, y & z for her son's wedding. You don't get a say. Even though you are paying for it.
Imagine this for the next 10/15/20 years.
YOUR DP IS LETTING THIS HAPPEN
When will he stand up for you and stop it?
Will he ever?
You need to nip this in the bud now. Or take a long hard look at how your life will be.