Hub out for KTV

I'm on my 20th week and as I'm typing this, my heart's beating real fast and almost not knowing what to do. Hub just came back from Happy Hour and I came to know he went to a sleazy KTV with a booked room. 2.5hours he came back home, drunk and snoring away now. If he would to say nothing happened, I'm sure no one would believe. Please tell me what I should do now. I'm trembling with anger.