Kourtney Kardashian Calls Deadbeat Scott Disick An A**hole On 'KUWTK'

In a preview for this week's episode of Keeping Up With The Kardashians, Kourtney Kardashian tells mom Kris—over speaker phone—why baby daddy Scott is no longer welcome around their children.

"Scott seems a little confused because he thought there was an open-door policy that he can come by whenever," Kris informs Kourtney over the phone as she sits with Scott in the kitchen.

"There was! There was. He was flaking too often," Kourtney replies angrily. "Every time I've tried to have him sit and have dinner with the kids he sits in the other room. He flaked on going to the kids' first day of school. He said, 'I can't go to school s**t because I get anxious,' when really he went out and partied throughout the next day."

"He's just a real f**king a**hole," Kourtney digs the knife in further as Scott nervously averts his eyes from Kris. "He's only concerned with himself and not the kids. And that's what's important here. The kids."

But it may not be over for this once couple just yet. As RadarOnline.com previously reported, Kourtney and Scott's breakup has recently turned into a makeup, as sources say they're having "nonstop sex" and seeking couple's counseling to repair their relationship.

In another clip from this week's upcoming episode, obtained by Entertainment Tonight, sister Kim is surprised to find Scott in Kourtney's house after they've clearly had a sleepover.

"I am in shock," Kim shares in confessional. "I haven't seen him in so long. He obviously spent the night and Kourtney didn't mention that he was there. I thought Kourtney was really strong and firm. I just don't understand."