Does lashing out mean cheating?

My husband has been talking about this girl hes friends with all the time lately....everyday he tells me something she said or did or what’s going on in her life..he just went to take a bath and he says I need time for myself and I say okay baby take your time... well I need to use the bathroom

so I go to the bathroom and this man locked the door... he never locks the door so I text him that’s weird please unlock the door. This man comes out of the bathroom visibly upset saying oh you don’t trust me and f this and f that your fucking crazy and then tries to say I lock the door lol I never lock the door when I’m in the bathroom...Does it seem like hes guilty of something and he’s lashing out? And now he’s saying he locked the door because he wanted me to come in but then I didn’t. He’s just behaving oddly. He is now non stop texting me that he’s not guilty and that I’m the one being weird.