Ugh. That is terrible. To be fair to yourself, I think receiving phone calls from jail would put anyone in a panic. You got off that merry go round, so just stay off! Since he has had no contact w/kids in two years, I would say receiving a DUI is not going to push him in that direction. If so, you have all the more reason to show he is out of control.
I love hearing you say that your cheeks hurt from smiling! That is the greatest thing. You keep taking good care of you and your kids and let him deal with his own fallout!
Big hugs!