Are you ? You definitely need someone that you can vent to in real life, help with perspective, & be a healthy sounding board.
Books are good, but you probably want a professional to help you with the specifics.
Hang in there. You're doing great with the kids.
From her POV, she's dying inside. She's doing anything & everything to numb out. I recognize it well.
Hugs
M 19 years, MC for 8 months, DB'd for 8 months 4 kids; 18, 15, 14, & 10 I was never meant to be a doormat. It took me years of therapy to become assertive enough to stop his abuse.