(KIKA) - - Bill and Anne Duncan on their first wedding day. See SWNS story SWOCdementia. A dementia sufferer has remarried his wife of 12 years after he proposed again -- when he forgot their first wedding and was convinced she was his new girlfriend. Bill Duncan, 71, has been with Anne, 69, for 18 years, but has forgotten parts of their life together due to his illness. Over the past nine years, Anne has cared for Bill full time and he now struggles to talk, so she was shocked when he popped the question last week. Devoted Anne was sure he'd forget, but convinced she was his new girlfriend, smitten Bill persisted, and kept asking when they'd be walking down the aisle.