You have a valid question - such quick relationships don’t last long. It takes great courage / compromises to understand a person and then decide to spend the rest of our life loyaly.
Now i am being neutral here because I need to know what is the reason that he got attracted to that female. Think about it and reply me on rugved1827@icloud.com
I’m separated and craving a fling but I’m not cuz I know it’ll hurt my partner (ex?). Divorces take a while to finalize. I think it shows great respect for you that your ex waited until the divorce was final and great restrain on their behalf. Rebound, hook up, serious, whatever it is I say just let them experience it and explore.