Kim Kardashian and Kayne West have a 'cordial' Christmas reunion to spend time with their four children, according to an ET source. We're told the ex-spouses 'got along' during the holiday and are now 'on the same page' about daughter North's social media use. It comes following a tense year between the pair after going back and forth on social media over each other's parenting. Kim and Kanye share 12-year-old North and her siblings, Saint, 9, Chicago, 6, and Psalm, 5.