Mary Claire Cheney (born March 14, 1969) is an American businesswoman and the younger daughter of former U.S. Vice President, Dick Cheney and his wife, former second lady, Lynne Cheney. She is openly lesbian and has stated support for same-sex marriage along with her father. She is in a long relationship with Heather Poe, a former parking ranger with whom she has had 2 children, Samuel David and Sarah Lynne. On June 22, 2012, Cheney married her long time partner Heather Poe. Cheney has a sister, Elizabeth Cheney (born 1966).