Kourtney Kardashian feels like Scott Disick has ''screwed up again''.

The 'Keeping Up with the Kardashians' star recently split from the father of her three kids - Mason, five, Penelope, three, and seven-month-old Reign - and thought he was beginning to realise his party lifestyle was irresponsible, only for him to screw up again.

A source said of Scott's recent visit to the children: ''Kourtney believes strongly that the kids need their dad in their lives, and even Scott admitted that she was being very generous.

''It was grace that he knew he hadn't earned. He started talking about being the father he's supposed to be. It seemed like he was having a moment of clarity.''

However, his good impression wasn't to last as he was pictured kissing a mysterious blonde in a nightclub just a day later.

The source told People magazine: ''It was like he undid all his progress from the past week and then he really screwed up again, and the entire family knows about it.''

The family are urging Kourtney to stay strong with her decision, with her sister Kim Kardashian West warning her to ''stop letting him humiliate'' her.

The source added: ''For the first time she's taking a hard look at what her new reality could look like. Before she just assumed nothing would really change, but there's a possibility of life without him and that's a scary thought for her. She hasn't made a final decision about what to do.''