Seven-year-old J.J. Vallow and 17-year-old Tylee Ryan haven't been seen for four months.
If Lori Vallow fails to show Tylee and J.J. she will be held in contempt of court and may go to jail indefinitely.
RELATED: Mom of 2 missing Idaho kids found in Hawaii with new husband; children still missing
Lori and Chad Daybell, parents of the minors, were found in Hawaii after they disappeared from their home in Idaho.
The two children vanished in September.
Nobody reported them missing for two months.