A source tells ET that Kourtney Kardashian’s kids are ‘overwhelmed’ by her relationship with Travis Barker. At the same time, they also feel ‘protective’ of dad Scott Disick. Kourtney and Scott share three children: Mason, Penelope and Reign. The reality star and Blink-182 drummer tied the knot on Sunday in Portofino, Italy. Exclusives from #EntertainmentTonight    • NEW From Entertainment Tonight