They say that Kourt is not only angry about the fact that he was hanging with Chloe Bartoli, but the fact that she thinks he may have fallen off the wagon after trying so hard to get clean.
As usual in the Kardashian family, when you mess with one of them, you mess with the whole lot of them, which is why Kourt's sisters are just as mad - at Scott AND Chloe - as Kourtney is.
Making things even more uncomfortable is the fact that this was supposed to be a boys' trip and as we have all seen in the photos, it's definitely a co-ed mixer.
As for the partying, Scott's friends are reporting back about some of his behavior. "They fear he is out of control and has fallen off the wagon," a source tells E! News. "He is partying hard and they are concerned."
Sounds like Scott has a long conversation waiting for him when he gets home from his trip.