Is with cheating

Ok I think my wife maybe having an affair or had one

We have been together almost 20 years and I know sexual interest wains but we went 6 months without anything. When we tried she said she felt like I was violating her and we’d atop. Which I was fine with. I wanted her to enjoy it.

Here are some things I’ve found strange

Complete lack of interest in sex
Pushes away for hug
Says she doesn’t like to be touched
I went to give her oral once and she was adamant not to do it. This was a first ever
Frequently talking about other people who have had or are having affairs at work.
Marriage isn’t the happiest
A super strong feeling in my gut she is or has.

I ask her once and she pretty much yelled at me calling it ridiculous .


Anyone have any thoughts I’d greatly appreciate it