In an interview Saturday on "Fox & Friends," Grace said she was "shocked" by Vallow's courtroom demeanor.
"In the last hours, the so-called 'cult mom'...just finally agreed to be extradited from Hawaii back to Rexburg, Idaho. She was just in court on that extradition and she didn't just show up -- she showed up in style with makeup, blue toenail polish and pink handcuffs," Grace said.
"And she took the time to curl her hair in cascades down around her face."
Vallow, 46, who is accused of child desertion and faces other felony charges, is set to be extradited back to Idaho from Hawaii where she tied the knot with fifth husband and end-times author Chad Daybell.
Vallow's two children, 7-year-old Joshua “JJ” Vallow and 17-year-old Tylee Ryan, have been missing since September 2019.
Following a request by Vallow's defense team, the judge Friday reduced her bail from $5 million to $1 million and ordered her to wear an ankle monitor at all times, according to Fox 13.
Vallow fled the Gem State in November with Daybell and was later sought by authorities for defying a January court order to physically present her children before Idaho welfare workers or police within five days.
It was expected that Vallow was going to be formally charged on Friday.
If she were to use a bail bond, Vallow would have to pay $100,000 to secure her release.
Grace said Vallow has said nothing about where her children are.
"I was shocked because her bail was reduced from $5 million to $1 million," Grace told host Jedidiah Bila. "You know, you've only got to put up 10 percent in most jurisdictions to get out and the new husband ... may do it."
The case crosses several states includes investigations into several mysterious deaths. The couple was involved in an Idaho-based group that promotes preparing for a biblical "doomsday" end time.
Fox News' Nick Givas contributed to this report.