Men and their looking habits and comments

Ok girls I need some advice, I admit out sex life hasn't been top notch it's hard being preggo.. And well tn we had a wedding I decided to look through my fiances phone through a certain buddies and his texts and see what they talked about since i found stuff before well about a month ago they had text and apparently his buddy who is a player showed him some naked pics he got from the girl he was banging.. And my fiancé decided to tell him he still couldn't get those images out of his head they talked more said how she has a hella nice body my fiancé said ya from what he seen and then it ended then the next day he asked how it went his buddy told him about how he did this and that with her and my fiancé said ya that's what he was getting to figured it happened meaning sex and his buddy said brother was mad bc he was kinda old for her my fiancé so oh well fuck it and he said he was going to keep banging her well my fiancé said whatever and then asked if she had Sent anything this morning of that morning then and he said no and my fiancé goes damn.. Like wth idk whether when he is sober in the morning if I should flip out if I should say anything at all I'm hurt in oissed in upset I get it's guy thing but to say he can't get those images out of his head and then to ask if she sent anything and say damn bc she didn't like wtf I'm not happy I want to cry I'm insecure with my changing body and I find that what would you girls do or say should I be letting it bother me this bad???