The judge can do as she pleases.
That was provided that the parents met conditions Walther would impose under the proviso of the Supreme Court opinion that the district court “may make and modify temporary order for the safety and welfare of the child.”
http://www.gosanangelo.com/news/2008/may/30/texas-polygamists-reach-tentative-deal/
You are wrong. The "Judge" has the power to make many orders, but she does not have the power to force the mothers of these children to sign the orders so she can pretend that they "voluntarily" agreed to them.
If they don't voluntarily agree, the orders are reviewable by a higher court.