Kourtney Kardashian Barker is gushing over her newborn son, Rocky 13 Barker. “The Kardashians” star, 44, and husband Travis Barker, 47, recently welcomed their first baby together, according to sources who confirmed the news to People and TMZ on Saturday. The pair have yet to personally announce the birth.Another source close to the Poosh founder revealed to People that she’s “over the moon about her son’s arrival” after “her pregnancy took a stressful turn towards the end.”“She is happy to just be able to snuggle her baby boy now,” the insider added. “She feels so blessed.”The reality actor shares three children — Mason, 13; Penelope, 11; and Reign, 8 — with ex Scott Disick. Barker has three children with his ex-wife, Shanna Moakler: Landon, 20; Alabama, 17; and stepdaughter Atiana De La...