I was reading through the comments. I mean, I just have to say, you are both wing here...the way it reads. There is no communication or trust.

Having said that - it's astonishing that you don't know what to do.

THE MAIN problem you have here is that even now you are refusing to take responsibility

Even now - it's her fault; she's misunderstood.

My brother had a way with women. You are asking what to do here?

Let me tell you if you want to save this marriage is simple.

Humble yourself man.

Get on your knees and beg her not to leave you.

That should have been the first thing you do.

Promise her whatever she wants.

You are still holding onto 'being right'! Hold onto your marriage if that's what you want. Hold onto her

What's wrong with her being right? What is it?

She's not misunderstanding anything - you are

I'm trying to find ways to give advice you can use and not just blame you.