Husband and porn

My husband broke his phone and has been using my business phone to watch YouTube on. Which I don’t mind. Well this morning I had a feeling I should go through the history on the internet on it and I found porn. Which whatever I don’t care about porn but our sex life has been stupid we hardly have sex and have been fighting a lot. He has distanced himself off from us. He used to grab my ass or boob randomly and now it’s like we walk past each other with a 10 foot pole. I am 27 weeks pregnant and I don’t know how to feel about it. Is this the cause of us not having sex? Is it something else? I don’t care if he watches it it’s not my point. Then I called him out on it because I’m irrational and moody, he said he puts it on our kids lives that he has never looked it up (obviously he has it’s on the phone which I haven’t used all weekend) and says that he isn’t that stupid he would have deleted it if he had watched it knowing I go through that stuff. Which just tells me he is sneaking it. I just want honesty is all I want. How do you make someone be honest with you? I swear in his family it’s rocket science to tell the truth. Ugh then he gets defensive and I told him. Is this the reason we hardly have sex he said I have had it a lot with you lately. I laughed and said what twice a month. That’s far from a lot my friend. I ask for it all the time, he’s always to tired or the kids this or that. I don’t know our relationship has turned to a shit show for the past 2 months. Rant end