Just a few weeks after reconciling with his baby mama Kourtney Kardashian, Scott Disick is back to his hard-partying ways.

A source tells Life & Style that although the 33-year-old completed a stint in rehab at the end of 2015, he "has been on a bender for a good three months. Kourtney feels completely betrayed."

MORE: Scott Disick Refuses to Go to Couples Therapy With Kourtney Kardashian!

The extent of Scott's problem was first revealed in January when he made headlines for boozing it up during the Sundance Film Festival. "A bouncer turned him away at the club door because he was so wasted," the source reveals. And a different insider previously told the New York Post, “He had a pretty wild party back at his house where lots of girls were in his hot tub. He has only been out at night, and stays out till 7 a.m. partying and sleeps all day.”

scott disick model splash

Scott cozied up to a blonde model in Miami on Jan. 31.

But things really took a turn for the worse when the father-of-three snuck a model into his hotel room while vacationing with Kourtney and her family in Costa Rica. "She is livid," the source shares of the 37-year-old brunette beauty. "He's an embarrassment to everyone. It's over."

Scott previously claimed in January 2016 that he wanted to get better for his children, Mason, 7, Penelope, 4, and Reign, 2. "People say, 'Focus on work. focus on work. Make more money.' I have money. The more money I have, the less happy I am," he said at the time. "The only thing I'm trying to focus on is calming down and focusing on the kids and trying to be a good dad."

MORE: Never Miss a Life & Style Exclusive by Signing up for Our Newsletter!

But the reality star appears to have hit a roadblock in his recovery. "It's been a long time since I've seen him sober," the source admits.

For more Kardashian news, pick up the latest issue of Life & Style, on newsstands now! And scroll through the gallery below for a reminder of what Scott looked like before he became “The Lord” we know today.