Stebic's family says Craig has not allowed them to see the children since the fall.
The judge has not made a decision on the case yet.
"This case needs to move forward. There are the grandparents and set of great grandparents that want to see the children. No one in Lisa's family has seen the children for six months. Lisa's parents have not been allowed to see the children for two-and-a-half years. We want to see the children. We want to know that they're OK," said Melanie Greenberg, Lisa Stebic's cousin.
Police say they believe Lisa is a victim of foul play.
On April 27, Lisa's family will hold a fundraiser to mark the first anniversary of her disappearance.
The Associated Press contributed to this report. All rights reserved.