In 2016, Alexander Pinczowski, who was married to Cain's daughter Cameron, was killed during a March 22, 2016 ISIS Bombing of the Brussels-National Airport. Cain subsequently acted as the representative of the Pinczowski family, providing the press with Facebook posts from Sascha Pinczowski (also killed in the bombing), a Dutch national and sister of Alexander who had promoted open borders and welcoming of refugees into Belgium.