Now, we're told official travel arrangements haven't necessarily been made at this point -- but our sources tell us Lynne and people in Britney's world feel like there's time on the table to make something happen ... and we've been assured Lynne herself is certainly hopeful.
It's unclear what exactly the holdup might be on Britney's end -- especially considering she just recently hosted Lynne here in L.A. for her 42nd birthday and appeared to be on great terms with her mom.
Sounds like Lynne's leaving the ball in Britney's court ... and praying for some movement. BTW, she signaled this same feeling to us on camera not too long ago at LAX.
Whether Brit ends up jetting on over or not remains to be seen -- but our sources tell us ... everyone in this situation feels like Britney should realize she has one mother, and since they've already started patching things up ... they oughta be together for the holiday.