Olivia Jade Giannulli and sister Bella Giannulli are "definitely upset" by their parents Lori Loughlin and Mossimo Giannulli's separation - but they "aren't surprised," a source exclusively tells Us Weekly. "They had seen the way their parents were interacting in the last year and knew this was coming," the insider says. "It was not a shock to anyone in the family." Us confirmed on October 2 that Loughlin, 61, and Mossimo, 62, have separated after nearly 28 years of marriage.