Kourtney Kardashian on Scott Disick: "Alcohol is His Blood"

Kourtney Kardashian's relationship with Scott Disick, the father of baby Mason, is becoming more strained as Kim Kardashian insists the club promoter has an alcohol problem.

In last night's episode of Kourtney and Khloé Take Miami, Kim is concerned that Scott's new job in the nightlife world is leading him astray.

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“Scott is such a great father. He is loving his new job," Kourtney says, defending her boyfriend. "Even though Scott and I have had our issues in the past, Scott and I are in the perfect place. He is really a changed man since Mason was born."

Meanwhile, Scott isn't even aware that he's behaving badly by staying out late, leaving Kourtney at home with their newborn son.

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“Rough six months of my life without Kourtney," he laments. "Worst six months of my life when I didn’t have Kourtney and that was it for me. I will never have anything worse happen to me.”

Meanwhile, Kim won't let it rest, asking Kourtney: “Do you think it's funny that Scott comes home smelling like alcohol?”

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But Kourtney continues to defend her man, even after two bottles of Kim's wine vanish from her Miami apartment. “It might be a little crazy of a job for him I guess… alcohol is his blood," she says.

"Everyone keeps saying that Scott working in a club is the worse thing in the world, but he is doing what he loves, he is working, and that’s all I care about.”

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Kim won't let it rest, saying, “Scott should not be staying out all hours of the night, coming home smelling like smoke, alcohol. It’s so selfish.

"Kourtney may not want to hear this, but if my boyfriend was out at clubs and not staying home with me and my new baby, I would be furious… Scott is out taking shots of tequila, when you Kourtney are home changing diapers.”

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But Kourtney doesn't take Kim's comments well. “It just seems like nothing is ever going to be good enough for my family when it comes to Scott…all of you guys do is pick on Scott.

"I am not here to tell Scott when to come home and when to come out. I am not a babysitter for Scott.”

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But when the new mom finds a bunch of empty liquor bottle — including Kim’s wine — on the roof, she realizes that she was wrong for being so deluded.

“He uses this club as an excuse to go out. Like why is he out until 5 a.m.? He has a girlfriend and a newborn baby at home," she says.

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"He can't just go out and have two drinks. He doesn’t know when to stop. I think it's really scary to thinking that Scott’s priorities haven’t changed…I have changed so much.”