She admits that she needs to feel that men desire her.
No. This is what she wants.
She's 45. This sort of sexually based admiration won't be available forever.
Your WW has not distinguished between what she WANTS and what she NEEDS.
She may not be a deep thinker.
She may never have given it any consideration.
Plan B (once you get there) could provide her the space to reflect on what she needs instead of what she wants.
This is the part of her that she will not or cannot change. She is the same flirt she was when we met � I was not able to get her to stop then either � hence all the resentment on my part.
Motivation to change comes from within.
If WW is not motivated, she remains who she is.
Until she is motivated .... usually by pain provided by outside circumstances.
My own betrayals, however, are due to my own self-esteem issues � I took the cowards approach to fixing a problem in my head only.
What "self-esteem issues"?
You don't get off that easily!

Dig deeper.
I think people blame low self esteem when they haven't done a proper self inventory.
My guess is... your wife uses other men to boost her "self esteem". Right?
I suspect you did a similar thing during your own betrayals.
You used OW to provide a positive reflected sense of self instead of earning self respect by virtue of doing good deeds.
Right now, life sucks a bit.
A bit.
But, you're alive.
You have some good things going in your favor.
Begin looking at your strengths and your talents and your skill sets.
I think working on a deeper level of understanding of what motivates you, would be time well spent.
Don't date.
You are vulnerable to that reflected sense of self trap.
I think you and WW have that in common.
Something to think about .... You married a known flirt.
Can you come up with a reason why a flirt seemed to be a match for you?
How did she make you feel when she flirted with you? Think of her flirtation as a mirror you used to gauge your manhood.
This is not to diagnose her character, but yours!!!