VIDEO : Once More, With Feeling: Kourtney Kardashian and Scott Disick Reunite

Two sources have confirmed to E! News that following a breakup lasting 18 months, Kourtney Kardashian and Scott Disick are officially back together. According to E! News, they've been back on for a few months. While they're not living together, they've been spending lots of time together. One insider says, "They are back together and giving their relationship a try again." So what's the cause of the rekindling? In short, the three children they have together have been the driving force. And because Scott has apparently "mellowed out" and "hasn't been partying."