After keeping a low profile in recent months, pregnant Kylie Jenner and her half-brother Rob Kardashian celebrated Christmas with their family on Monday, December 25. In Snapchat videos posted by pregnant Khloé Kardashian, Kylie, who’s expecting her first child with rapper boyfriend Travis Scott, kept her baby bump hidden as she posed with her sibling. The siblings and their mom, Kris, gathered at Kourtney Kardashian‘s house to open presents and enjoy a festive breakfast.