No matter what her sister’s going through, Kourtney Kardashian will always have her back. As Kim Kardashian deals with marital issues, Kourt’s going to be there for her — “and at all times of day,” a source close to the family tells HollywoodLife EXCLUSIVELY. After all, Kourtney knows all too well what it’s like to go through a messy public split while trying to raise happy kids at the same time.