If you want to be disgusted, you will be. Right now you sound detached, almost methodical in your approach to delving into the revelations. Be careful of hurting the you within with all the reading.
It's good to hear your mom is calmer. Although my mom never yelled at spouse (the one time she did see him, he walked past me to give her a big hug which she accepted) she felt like there was a death in the family. That's all she talked about which annoyed me briefly until I realized she was grieving. My parents felt ex 'hung the moon', much like yours.
You're reading the past. It's the present that matters.
What are you going to do with your month sans kids? If I get the part, why not come to CT and see me act like a lil old lady?
I'll be incommunicado when you return and will catch up after that.