You do not know all your options on how to respond. Right now is the time to get yourself knowledge. With knowledge comes power. With the new knowledge, you can make some choices in how to respond to what is going on.
You have many choices to make in many areas. I tried to captures as many words as wisdom from people posting here.

Read as many of these as you can:
https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2910892

If you read enough, you will be able to form a plan based on your new insights. Things that typically work are counter intuitive.

Read the boundary thread. Boundaries are about protecting you (and the relationship). It is about how you will behave.

"What is best for my kids is best for me"
Amor Fati
Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712