Overreacting?

So my husband has a snap chat and he's only friends with the guys he plays the game with on there. Well they all talk in a group chat and I just opened one because it kept going off nonstop and he's alseep. And turns out they send videos in the group chat of slutty ass girls in thongs and teasing their shirts from tiktok. My husband hasn't sent one(that I could see) but he sure as hell hasn't told me about it nor told them to stop or idk just not be apart of the chat🙄 so I sent one back to them and told them that noone wants to see that shit🤷‍♀️After I sent that(they didn't know it was me) they sent more videos of girls literally 5 minutes after and I told my husband that I seen what's been going on in the chat bc I'm mad and what I messaged them.he opened them and didn't say not one word to them nor remove himself from the chat or even apologize to me. He thinks that just because he never sent one back that he's not doing anything wrong. He expects me to believe that he just opens them real fast and exits out of it quickly and doesn't watch them. My thing is if you know you shouldn't be apart of that kind of thing, why haven't you A)told them to stop B)remove your self from the chat C)or even tell your damn wife about it? Am I overreacting? Also in 30 weeks pregnant with our 2nd child

Edit: I have no guy friends because it upsets him thinking everyone has a thing for me. And he thinks porn is not okay for us to watch, but apparently this is okay?