Un-freaking-believable! I don't know how you have managed to stay so calm! That was child abduction, Karen!
I think you need to get ahold of your L, vacation or not, ASAP! This is serious.
If you have had any doubts before about your H's intent, after this stunt you should have none left. He is forcing his will on the situation with zero regard for the children's safety, let alone their other needs.