I am happy to hear that Vanilla Ice agreed to get the divorce done in Arizona. It really makes much more sense.
Sorry to hear that you would have to give up your babies for 4 weeks in the summer. I would hate that, but I am glad you can look at the positive side and realize you have them the rest of the time.
IMHO, I don't think that he could last 4 weeks with them. I think your girls would miss you terribly and I wouldn't be surprised if they ask to go home after a week.