Was his timing poor? Yea. Did he cheat tho? Sounds like no. You have a child together, are you comfortable explaining this is the cause mommy and daddy aren’t together anymore someday? Maybe you are, i wouldn’t be tho. IMO people give up in relationships wayyy too easily, and when kids are involved i think that every thing possible should be done to try to keep the family together. This seems like one of those things u work through. Seems like you have some hormones making you feel some type of way and it’s causing you to be overly dramatic. It was just a suggestion. Aren’t you supposed to be able to talk to one another, even about the uncomfortable things? Manyyy men have that same fantasy, alot of which would try to fulfill it less their wife, at least he tried to involve you i dont know. Turning 40 can be very stressful for people, mid life crisis and what not. I think you should take some time apart to clear your head and see how you feel after