Maika, I like how you're thinking about boundaries for your upcoming convo. It's the best way to face the unknown. I personally suspect it's a temp check.
Where will you have this convo? Will it be someplace where you can get up and leave if things become unproductive?
Regarding revisionist history, I've noticed my STBXW likes to bring up the past a lot. It could be she's trying to convince herself of her actions. It could be she wants me to apologize for my faults, so she feels justified. Or maybe she just had too much cabbage for dinner.
Remember, keep your expectations in check.
Me-47,XW-43 S13,S16 M:18 BD:4-23-17 W filed:7-17-17 (5 months of in-house separation hell) W moved out:1-6-18 D granted:2-15-18 Decree signed:3-29-18