Caught my husband

The other day my husband asks me if I was ibterested/sexually attracted to someone else. He also asked me if I was talking to someone else. I told him absolutely not and his reasoning as to asking was Bc we don’t have sex as often as we used to. I told him it’s simply Bc I’m tired. Fast forward to today and he received a snap chat on his phone from a girl name Haylee Mae. So i opened it (left his phone on the couch) and he starts the conversation with “Ayy” and she responded back to him “do you want to buy my nudes” so I screen shot it and she said he was a weird white bitch and didn’t need to screen shot her messages. My husband claims he doesn’t know her. Yet this female knows he’s white and he messaged her first. He is trying everything under the book to make this sound like it wasn’t him. I seriously never thought he would cheat on me. But now that I’m insecure with my body and we don’t have sex as much, he thinks it’s ok.