This may be one of those situations where she feels as though she has fallen out of love with you, and her "temptations" to enjoy other men flirting with her is redefining her own childhood traumas.
If she went to therapy and it only made it "worse" is because she is unable to accept that she and her mom may be just alike.
If your wife is unable to accept who she is and love herself (desires for other men and all), then she will have to reject those ideas and you lie in bed beside her at night while you have to reject the ideas of being with her. If this is the case it is important to realize that the two of you are experiencing the same amount of pain. Try and get her to talk about it.
I have been known to stretch, extrapolate, exaggerate , generalize, colorize, analyze, anal-ize, maximize, the truth till y'all go bug eyes.
Butter, Badsanta's opinion is either, way over the top....or spot on.
Me? I think her dutiful performance is winding down. Her show has run its course. She no longer cares, and is likely depressive and has gone from low desire to no desire.
Her desire has flat-lined, as would "go" a soft knoll of dirt on a windy barren plain. Flat, like an old tire, on an old car that nobody cares to drive.
My friend, you had the lady in her prime. And a prime example of frigidity you failed to conquer.
Let the Dear Lady go. She has driven past the last gas station, and her last gasp ration of sex be gone.... from your grasp and from your loving grope.