What would you do?

I came home from working and noticed things that my son had gotten into that he shouldn't have if his father were watching him. I started talking with my husband and noticed he seemed like he had been drinking but he was going on and on about how tired he was! I've had less sleep than he was getting and I've never looked or acted like he did. I asked if he had taken something and he said no. He went onto bed while I had to clean up his mess! I noticed something spilled in the bedroom and when I smelled it it was alcohol! It's not ok with me for him to drink lille that while watching Levi then clean it up like he wasn't drinking....what do I do?