A single mom in a relationship?

If I'm home I am the only parent. He decides to either go somewhere alone, like fishing or something. Sometimes he spends all day in his man cave that's actually a shed smoking cigarettes, or he just sleeps all day.

I talked to him about this last night. He said he would stay up and spend time with us and help me. He got home and went to bed. I'm 9 months pregnant with our second child... I feel like he's just a 3rd child

Update: I just found a box of condoms with 10 missing. I confronted him and he said first he had no idea where they came from. I said that was bulshit. Then he tried telling me he found them in the trash. He's a garbage man but come on.... Not even he is stupid enough to bring something like that home from the trash. He yelled at me that he wasn't cheating then went back to bed.