SSMG--you say your wife found therapy too stressful. It's true that self-confrontation and change are the most agonizing, gut-wrenching experience. However, I think if you read any of the "success stories" on this site, you'll find that, despite the awful circumstances which precipitated change, NO ONE regrets having taken the opportunity to grow.
I'm well aware of this. And I think my wife is too. But for whatever reason, she has resisted taking that step.