I disagree SBH,

You still have to make a decision to trust after it has been broken too. You make an ongoing decision to keep trusting.

You can't isolate your W so she has no contact with the outside world.

Even if you leave your W, you won't have it again because at some point it will arise with your new SO because you didn't resolve it.

Patience is bitter, but its fruit is sweet.
--Jean Jacques Rousseau.