Peter has taken the couple's two children, Junior, 13 and 11-year-old Princess on a holiday to Orlando, Florida but Katie has taken to Twitter to check in on them after alleging she has not been able to make contact with them.
Katie is believed to have been worried after news broke about a shooting at a gaming tournament in Jacksonville, Florida - which is 140 miles from Orlando - on Sunday (26.08.18) and took to Twitter to beg Peter to get in touch.
She tweeted: ''Still up at this hour, trying to contact my kids in America. Been trying Morning, Afternoon and Night. Please @MrPeterAndre let me know they are ok? (sic).''
In June, it was revealed that Princess and Junior were living with Peter, as Katie dealt with her split from Kieran Hayler.
The 40-year-old television personality split with her estranged husband - with whom she has four-year-old son Jett and three-year-old daughter Bunny - in August 2017, and in order to ease the stress put on her brood by the split, Princess and Junior moved in with their dad.
A spokesperson confirmed that Katie - who is also mother to 16-year-old son Harvey - and Peter ''agreed it best'' for their children.
They added: ''What is important [is] that the focus is on what is best for the children during tough times as Peter has acknowledged. Katie is a remarkable mother, Peter is a wonderful father, together they are doing what is best for their children.''
The news came after 45-year-old Peter - who also has daughter Amelia, four, and son Theo, 20 months, with second wife Emily MacDonagh - insisted he was setting up a ''stable home'' for Princess and Junior.
He said: ''J and P have gone, and will go, through tough times in their lives. But no matter what, Emily and I will always provide a stable home for them. People can read in to that how they like. We have a lot of routines and I'm really strict on school nights.''
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