Tom Brady -- Gisele Sticks It to Tom's Ex ... With 'In Your Face' PDA

In what appears to be a reminder about who won the war over Tom Brady, Gisele planted a big fat kiss on the QB's face this weekend ... right in front of his OTHER baby mama.

Ouch.

Tom and Gisele ... and Bridget Moynahan ... were all out together at a park in NYC hanging with all of Tom's kids (2 with Gisele, 1 with Bridget).

To be fair, Gisele and Bridget actually hugged each other at one point, but c'mon ... it's sorta like when Kobe hugged Shaq ... not a lot of feeling behind it.

The history between the 3 is interesting ... Tom started dating Gisele 8 years ago ... while Bridget was pregnant with his child.