Maybe it's just me but alarm bells would be going off.
I'd already spoke to wife about this same situation should it occur.
I told her I'm fine with her having a regular lover, but inbetween her seeing him I'd prefer it if she meet other guys also.
I guess that's reassurance for me to show it's more about getting cock than getting attached to one particular guy.
I actually never even thought of that! That is a fantastic idea because yes you are right then it’s less about feelings for someone and more about just hooking up and sex. I will bring it up to her thank you!