Mel Schilling, a dating coach on the British and Australian versions of "Married at First Sight," has died at the age of 54. In one of her last social media posts, Schilling revealed that she had terminal colon cancer that could not be treated. The tumor, which was the size of a lemon, was discovered during a scan and was successfully removed but returned and spread to her lungs and brain. Her husband, Gareth Brisbane, stated that she passed away peacefully and surrounded by love.