Lilkim, you handled that well and hopefully can stand by your boundaries on this. How sad for a little child to pick up that "daddy's drunk".
Maybe put a lock on the door higher than these kids can reach, so that next time (and there's always a next time) you can leave him on the outside looking in.
Special hugs to you, that's quite a handful of kiddies you have and how very blessed they are to have you.