Erin and Sara Foster get candid about their early relationship with their father, David Foster

Sara Foster and her sister, Erin Foster, are not sugar-coating things when it comes to their feelings about their dad, David Foster, from childhood. “Our dad was raising other children. He wasn’t raising us. He was raising Brandon [Jenner] and Brody [Jenner],” Sara revealed on Kate Hudson and Oliver Hudson’s “Sibling Revelry” podcast this week, according to Us Weekly. “So, for Erin, what weighed so heavily on her, was me. I was, like, dealing with my whole own emotional turmoil, which was watching my father raise other children. That was the thing that kept me up at night.” David married the Jenners’ mom, Linda Thompson after splitting from Sara and Erin’s mom, Rebecca Dyer, when the girls were young, they explained. “We never lived with our dad, right, after our parents broke up. So, from the ages of 3 and 5 we were living with our mom, and our dad was living in this $20 million house with Brandon and Brody. It had the trolley, it had the pool and this thing,” said Erin, 37. “They had a very different life. But, out in the world, people would be like, ‘You guys are spoiled brats and you guys have it all and you’re rich kids.’ And we would be like, ‘I mean, yeah, but we don’t live there. We don’t have the gate code. We don’t have a room there. We’re not really a part of that world.'” Erin added that she and her sister would “get all the backlash for” their father’s lifestyle without getting “the benefits.”