Kylie Jenner, 23, is supportive of Kendall Jenner, 24, and her new romance with Devin Booker, 23. “Kylie is really happy that Kendall has found someone to spend time with [and] because it’s hard for Kendall to really like someone,” an insider spilled to HollywoodLife EXCLUSIVELY. “She sees [Kendall] really likes Devin and enjoying his company…she’s not at all jealous that Kendall is seeing someone. Kylie and the rest of the family seem to like Devin,” the source also explained.