Roommates for the Next Two Months

[Sotto]

I think the 'just couldn't help it' is an indicator that she is still 'driven by emotion.'

As BW says, it would have been possible to do something different. To say that she had become unhappy, to agree to work on things, to resist the charms of OP...and so on.

But those all require bravery, persistence, moral fortitude and so on. And when you are driven by emotion, those things tend to go by the wayside.

It helps me to think that my H became involved with OW because he became unhappy and didn't have the tools to do something constructive about that. Instead he made a destructive choice. If he had the tools it may have been different.