After Portwood, 26, revealed they had split after a stint on Marriage Bootcamp: Reality Stars, Baier flew to Las Vegas to compete in the World Series of Poker.
"End of level 1. 51K," Baier, 46, posted on Instagram. "End of Day 1. 64.8k. Long day. Back at it Tuesday."
As Radar readers know, Portwood accused Baier of draining her bank account on part one of the reunion special.
"Where's 60k, 30k, 90k? Now I'm pissed off," Portwood said on the special. "I got money so it's cool, but where's 90k at? You just took 30k out and you won money then put 20k back in."
When Dr. Drew Pinsky asked if it was a gambling debt, Baier denied it and explained he has the remaining money in his backpack.
Just days before the Las Vegas trip, Portwood bashed him over Twitter.
When he tweeted, "Here's to a long weekend! What are everyone's plans for #FourthOfJuly weekend?" she fired, "Long weekend of getting dumped!"
She then told him to "lawyer up," since he owes her "a little bit of change."
She ended the rampage with, "Been two days at @MattEPT is already posting videos on Instagram of him at someone's house with 50 bottles of liquor everywhere… it's on."
A source exclusively told Radar that they "went their separate ways" and are "definitely broken up" after Baier left filming early.
Are you surprised by Baier's behavior? Tell us in the comments!
We pay for juicy info! Do you have a story for RadarOnline.com? Email us at email@example.com, or call us at (866) ON-RADAR (667-2327) any time, day or night.