Good for you, maybe she will get help now. DYFS will probably come to your house to investigate. They will most likely either make her leave, she can go to her family, but they will most likely leave the kids with you. If you asked them not to call your house, they will most likely just call your cell, but did the police tell DYFS that?
Yeah, you did probably sign the death warrant on your marriage, if she doesn't get the help she needs and then the whole family gets help and she wants to finally face up to her responsibility in everything, and really wants to reconcile with you. But she will probably get court ordered therapy of some sort, I guess.
Can you take the kids somewhere until the police do their thing? Good Luck, things should hopefully start to get better now, at least with you and the kids not having to be afraid all the time. Just watch out for her family, they could use your history against you, so get a lawyer and be prepared. L