lol sounds like youre damned if you do or dont then. catch 22Scaaar is right. An affair is gonna start by you being controlling and not by the girls trip. The fact that y'all actually got into a big fight about it says more than you need to know. You don't want to look insecure in front of your girl...especially your wife.
because we all know that women will test you. sanctioning frequent girl trips past marriage is a bit much but like you said you dont wanna control them and seem insecure. at the same time you gotta be assertive and set boundaries. the plight of men