TS , you can safely rule out cheating. If she really cheated, she won’t be so angry at you because you didn’t coax her(7 days & she remembered the duration). She will happily go seek the cheater comfort & don”t even bother about the details of the her anger.

Read her intend & her actions. All her doing are trying to pull you back into her life.

She got a lot things to tell & she still tells you knowing you have nothing much to tell her. She need the advice , she still comes to you knowing you may not have answer for her. She invited you to put thing down & do thing together with her but you refused her.

This is what happened with most feminist.
When they have money they feel that they don't need man,
When men have money they will try to make their women happy. (or other women)

I think after a while, the man or woman will wise up and say to him or herself, fcuk this, I'm just gonna make myself happy ....

Today, I wish to share stories about my marriage life. I've been married for 20 years and have 2 children. Recently because of some argument, my wife said wanted to divorce and the reason is our point of view is different. She said I didn’t coax her during the time we argued and let herself calm down for a week. She also complaint thru these 20 years of marriage life, our 3 life viewing angle (三观) is different. She always said our way of thinking, financial freedom and mindset are not the same.

Thinking:-
She always said our children are grown up, we can go out and do whatever we want. Is time to let go but I’m not thinking that way. My children are still in their teenage years and during these periods they need more attention. These periods are the time they step out into the social world, a wrong step might cause their whole life. 

Financial freedom:-
My wife's income is twice of my income. Due to that, she will spend most of her time at work.
And for my job, it is more simple. So I can have more time to take care of my home and family.
So, 80% of household issues were taken care of by me. Like cleaning, cooking, sending children to school at 6AM every morning etc.
I had spoken to my wife, since her job needs more time, so I’m staying back to take everything, so she can concentrate on her work and be hassle free when back from work.

Mindset:-
Her job gives her many opportunities to explore new things compared to my work, everyday I just sit in my office chair and work. When we had a conversation, she had many things to say but for me, everyday is the same. Whenever she seeks my advice she will say I sit too long in the office. The business world is different now.

Actually, I agreed with her. The business world had changed a lot and her pace moved faster than me. In my opinion, our children's pace is still slow. Someone had to move slower to guide them and take care of everything. Like those dramas, a successful husband will complain that their house wife knows nothing and end up divorce them. I have the same feeling now.

It looks like the one who stays back taking family might end up getting dumped.

Probably she found someone at work and is having either an emotional affair or a full blown affair.

Women won’t leave their husbands from long term marriages unless there is a third party. My advice to him is to get a good divorce lawyer and get full custody, guardianship and control over his kids.