Tia tells us, she and their 2 kids, Cree and Cairo, will absolutely be spending the holidays with Cory -- because, no matter what, they'll always be family.
We gotta say ... she was wearing a huge smile as she spilled the deetz.
TMZ broke the story ... Tia filed for divorce back in October ... pulling the plug on their 14-year marriage. Soon after, she made it clear she and Cory would remain friends.
It was the kinda thing lots of divorcing celebs say, but now it looks like Tia and Cory are walking the walk. As she told us, "Family is family" and that's super important to her.
The holiday plans might not be a complete shock -- the last time we saw Tia, it was evident there's still a ton of love between them. She said they were doing "amazing" with co-parenting and she had no complaints.
As for reconciliation ... back then she said she was "taking everything a day at a time."
We'll see just how merry a Christmas it is for the exes!