Separated, but living together with hotwife

​Currently I share apartment with my wife. We separated on very good terms a month ago.
We both still love each other as best friends and have a beautiful 4 year old child together.
We are both 32 years old. I am a computer nerd and she is 10/10 trophy wife (recently got boobs and nose done to improve herself even further)

A little background:

We know each other for 25 years, since we went to same school and got together shortly after I went to college.
We got married after 1 year of dating. She is is the only girl I had sex with ever.

We were both very poor, but then got rich over the years and brought our dream apartment a year ago.

I developed cuckold fantasies about two years in our marriage, since I noticed very bad performance on my part.
We tried femdom last year and she liked it a lot, but somehow due to stress it fell apart.

I always tried convincing her to cuckold me, but she said she has a mental block. She is too loyal to do that.
We tried being in open relationship an she still could date others.

Then few months ago random black guy got in her DMs and she started developing feelings to him. He live far away, but are planning to meet up very soon.
He is very dominant alpha male with 9 inch cock, mine is 5 inch and I am bad at dominating.
A dream scenario for cuckold right?

Nope, she said only way she can consider having sex with another if we are separated and would not have sex in any way.
Yea, so we both went through a week long depression.
Living together works for now, because we have our own space within huge apartment. A child does not suspect anything.

Since the separation I have mixed feelings:
On one hand I am totally free rich young man who could find new dates and be a sugar daddy to 20 year old.

On other hand I still love her and fantasize about being her cuckold, being forced to wear chastity cage while cleaning up her creampie.
I could even accept being pussy free if I can eat her ass and pussy often.
This is still a lifelong dream of mine.

What should I do? Should I wait longer, maybe after she fucks new guy for a while she might go for cuckold dynamic?

Anyone has been in similar spot?