Scott Disick has "proved" himself to Kourtney Kardashian

A source said: "Their love for each other never went away. He's been trying to win Kourtney over for a while now, but his constant partying was a huge issue. He's been spending a lot more time with Kourtney and the kids and proving himself to show that his family is the priority."

And the 37-year-old television personality was the one who inspired Scott to make the change.

The insider told E! News: "He's doing his best to keep himself in check. Kourtney is definitely the reason for that. He still has his own place, but he loves her. He's always loved her and wanted his family back together. They're best friends - that's never changed, even when things were rough between them ...

"Scott has just been over the partying. He got sick of it and decided to clean up his act. He was having people over at his house to party until 6 a.m. all the time, and he hasn't been doing that either."

Meanwhile, it was previously claimed that the couple are giving their relationship another try.

A source said: "They are back together and giving their relationship a try again. Scott's mellowed out a lot and hasn't been partying."

The news of the pair rekindling their romance comes soon after it was revealed Kourtney was worried about labelling the couple's relationship for fear Scott wasn't "fully committed" to her and the kids.

An insider shared: "She got screwed over by Scott so many times in the past. Kourtney is still protecting herself. She doesn't want to say that they are back together until she knows for sure that Scott is fully committed to his family. But so far so good. Scott has been amazing to Kourtney, and she is very happy."