Angelina Jolie is fuming at soon-to-be mother-in-law, Jane Pitt, after the Pitt family matriarch invited former daughter-in-law, and Angie’s love rival, Jennifer Aniston, to Christmas dinner!

Star Magazine snitches gush:

“Angelina went postal after learning that Brad’s mom, Jane, had invited Jen (they’re still close friends) to join them for the holiday — and Brad found himself caught in the middle of a nasty showdown. It’s an awkward situation.”

“Jane is still very close to and friendly with Jen,” the source tells Star. “And that’s causing big trouble for Brad.”

“It’s a tough spot to be in. Brad feels he has to respect the relationship between his mom and Jennifer.”