Bezi
Its not that cut and dry i know.
But you can threaten him with it, i bet he wont want you to go (leave him i mean).
Scare him into believing your confident enough to do it.
(it was at this point in my earlier posts that everything went mad on here, all i was trying to say was that. Show him your confidence and clarity on the issue, i did that by throwing tea over mine and another time i punched him, it was a long time ago and it had dramatic effects - i dont mean that you should do the same but make damn sure by whatever means you see fit to get your boundaries set in STONE)
And dont let him beleive that he can get away with lying to you. Make sure he knows you wont stand for it. If you ever find out again about any lying that will be that...sort of thing.
I do feel, that alot of what others have said on here could be the end result if your dp carries on treating you like he did this weekend. You will undoubtedly resent him for it too. The relationship will break down. And i guess he would end up drinking more and more and lying more and more.
I hope you have a good time away as a family, it might do him good to see you all enjoying yourselves as a unit together.
I still say that showing him that you can still be fun after the birth of the lo would be a good way forwards. Maybr he has forgotton who you are and needs to be reminded why he fell for you in the first place.
Its not all doom and gloom as some on here have suggested, because he has done it this once, doesnt mean he will do it for the rest of his life and worse. There is still hope and a chance to get it all sorted. But its down to you, i beleive to keep him inline.
Good luck.