And another question: WS keeps suggesting there were issues in our marriage that, when she began to have feelings for OM, made her question our marriage even more. Is this her way of not taking responsibility? Should I bother even addressing this with her now, given the situation? Thanks.
This is typical wayward "script." It's called "re-writing of marital history," and it's common in nearly 100% of affairs. It's a justification/rationalization thing.