Scott Disick went back to his party hard drunken ways on a recent episode of "Keeping Up With the Kardashians."

According to Us Weekly, the father of Kourtney Kardashian's three children was drunk and out of control when he showed up to his mother-in-law's Las Vegas party.

Kourtney was not happy with him, as she was eight months pregnant at the time of his drunken outrage.

Disick wanted to host the momager's party and promised he would be on his best behavior although she had her doubts.

"He always gets into a bunch of trouble," Kris Jenner said during an on-camera interview. "My biggest fear is he takes twelve steps backwards and falls off the wagon."

Disick indeed fell off the wagon. He partied as soon as he hit Vegas and showed up late to dinner with Kris. As the night went on, he openly drank in front of Kris and her friends while being rude to them. He even sprayed champagne all over the momager.

"We haven't even gotten to the club yet and I'm seriously worried," Kris said on the show. "I've really got to get him to slow down or we've got a huge problem."

Disick has been open about his alcohol abuse on "KUWTK" in the past and also spent some time in rehab, Us Weekly reported.

But just 10 days after rehab he hosted a party in Sin City. He only spent about a week at Rythmia Life Advancement Center in Costa Rica, which he said was the initial plan. TMZ reported that a program typically lasts at least 21 days.

He once had to be hospitalized after drinking and taking pills on an episode of "Kourtney & Khloe Take the Hamptons."

He claimed he is too busy for rehab and from the look of the last episode of "KUWTK," one week of rehab was not enough.

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