Hello ....
I agree with so much of the advice given to you ... but, as you said, even her mother can't convince her to go to a talk therapist!
While this is often backwards, i'de like to suggest something slightly different for a strategy for your wife. What do you think would happen if you had a talk with her - saying that you believe you need to see a counselor ... not her! Then ask her if she would go with you!
First .... it's not really a lie. You could stand to see a counselor - a talk therapist. Then, just maybe, she wouldn't feel threatened in any way - to accompany you while you're seeing the therapist.
It may just put her into a better comfort zone - so that, some day soon, she would be OK with seeing a therapist herself. But, in the meantime, you would be doing yourself some good, hopefully allowing your wife to relax (while you're on the preconceived hot seat) - and possibly getting her interested in going to a couples counselor.
Again, I think this is the reverse of how it should be ideally done - but she needs to get thru the fear she has of going to see someone for help.
Actually, a couples counselor might be the best starting point - but with you being the person who needs the counseling for the first few visits and your wife being there for your support.
Then when both of you become involved with the counselor, your wife would not have to develop trust with another counselor. That might be amuch smoother transition.
Hopefully ..... she would agree to be a support system for you - when first going!
Peace and wellness
Rob & Gizmo
P.S. - curious that this started about the same time as her current job!
Any thoughts there?