Catherine Zeta-Jones made sure to publicly support her husband Michael Douglas over the weekend on what proved to be a bittersweet day.MORE: Catherine Zeta-Jones' incredible Spanish home has breathtaking sea views - take a lookThe Hollywood legend faced Father's Day without his beloved dad Kirk Douglas for the second time, following his death in February 2020.Michael had paid a heartfelt tribute to Kirk, who died at the age of 103, by sharing a lovely photo of the pair of them together posing by