Shanna Moakler made shocking allegations about Travis Barker and the Kardashians. During the model’s Wednesday, January 10, appearance on the “Dumb Blonde” podcast, Moakler, 48, opened up about the demise of her marriage to the Blink-182 drummer, 48, and claimed part of their downfall was an alleged relationship with his now sister-in-law Kim Kardashian. According to the former Miss New York USA, she and Barker were “working” on their relationship when she was sent text messages between the rocker and the SKIMS founder, 43, from an anonymous source. “They were trying to meet up at her sister’s…