Almost a year and a half after their shocking breakup, Life & Style has exclusively learned that Kourtney Kardashian and Scott Disick are officially back together!

But that's not all. The pair, who began dating in 2006, have also discussed the possibility of expanding their brood.

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“Scott’s asked to move back into Kourtney’s mansion after Christmas, and the couple have told pals they’re trying for another baby,” an insider reveals. “It’s only a matter of time before No. 4 is on the way.”

kourtney kardashian scott disick kids splash

Kourtney, Scott, Mason and Penelope in October.

As for his substance abuse problems that contributed to the split, the insider shares, "[Scott] apologized for his mistakes and told her he's a changed man."

The duo has three children together — Mason, 6, Penelope, 4, and 23-month-old Reign.

For more Kardashian news, pick up the latest issue of Life & Style, on newsstands now! And scroll through the gallery below to see Kourtney and Scott’s cutest photos together.