Caught!!

Caught my bf hiding shit from me last night. Asked what he was hiding and he got all upset and started telling me to "get off his back" later on he told me he was looking at naked pictures of girls ("Google") I'm so disappointed and disgusted. He said he did it cuz I don't have sex with him when HE WANTS IT. I'm sorry I'm a stay at home with a two year old and 28weeks pregnant and trying my best to keep a house clean.! How do I go about this whole situation?. To me if someone looks a stuff like that then they aren't happy with the person they have.... Someone help!!!