By Breaking Celebrity News Staff

Kourtney Kardashian's relationship with Scott Disick is in crisis, as the vice-ridden baby daddy is "on a downward spiral" and "more of a mess than I've ever seen him," according to an insider who spent time with the reality star recently.

Khloe Kardashian, an insider says in a magazine report, was the one who "stepped in” and told Kourtney that Scott is back to boozing.

Despite recently welcoming their second child, a girl named Penelope Scotland, the relationship between the two remains "the worst they've ever been," an insider said.

"Scott is never alone with Penelope because he is so irresponsible," said the insider, adding Kourtney's to the point where she encourages him to leave the house so she doesn't have to deal with him. "Kourtney doesn't even like for him to hold the baby because she's afraid he'll drop her."

One source says Scott's taken up the nightlife because he's bored: "He's a 29-year-old dad with no real job and nothing to do. So he's partying again and drinking heavily."