Although he's claimed to be committed to Katie and their relationship, Jamie has secretly bought a $1.7 million home for his ex, Kristin Grannis, and their daughter, Anelise, 10.
"Suri is old enough to understand a lot of things — and she doesn't like being part of Jamie's endless party parade," an insider told RadarOnline.com. "She resents the way Katie drops everything when Jamie calls. Suri liked it better when it was just her and Katie."
Since then, the long-rumored couple have not been seen together.
Now Katie's pals are concerned over how close Kristin's new Los Angeles-area house is to Jamie's mansion — and how frequently he's been pictured with Kristin in recent months.
What's more, Katie and Suri, 13, are sure to be upset by pictures of Jamie, 51, playing the part of a happy family man with another woman and child of almost the same age.
As RadarOnline.com has revealed, Jamie even said he was ready to step into the shoes of Suri's long-absent father, Tom Cruise — reportedly telling her, "I'm your daddy now!"
Instead, he's been cavorting with Kristin, whom he'd once planned to marry, said sources.
Kristin's dad, Richard, has hinted she wasn't pleased with the attention Jamie was lavishing on 40-year-old Katie.
"Kristin and Jamie's relationship has become more tense in the last year because of his other relationships," he said in 2017. "It makes things more complex, especially considering their daughter is old enough to understand what is going on."