I can appreciate the swearing off men for the minute - I’d need to regroup after that

Yes, I agree about it saying much more about an OW that she would become involved with a married man and the validation of all this being midlife.
Heck, on occasion I may text my best friend’s husband a funny comment about his fav hockey team etc. I always make sure my best friend knows I’m doing it - it comes down to basic respect for another person.
The fact that the OW doesn’t care about the wife is disgusting enough but when it impacts children as well then that adds another layer to the OW’s inability for compassion. It’s plain ruthlessness.
In no way do I excuse my h’s behaviour and poor choices in all of this. I think though I can see his brokenness and bizarre changes more clearly and perhaps that’s a factor when I look at the greater picture.