Amber showed up in NYC to support Wiz at his album release party. It looked and sounded like they were putting up a united front ... mostly for their kid. Wiz gave his "baby mama" a shout-out from the mic, and Amber posted a pic captioning it, "supporting Sebastian's dad."
Things went from PG to PG-13 in the back of their ride home from the party.
Can't help but notice ... the two weren't getting this physical before the Kanye feud, which means maybe 'Ye was right -- he's got the power to bring exes back together.