I have a friend who won't eat any veggies except for corn and potatoes. She had a heart attack almost a year ago, and she refuses to change her eating habits. She'll eat five slices of bacon pizza in one sitting, hamburger helper, mac and cheese, rice with enough butter to kill a whale, fried fish, and the list goes on.
Some people are digging their graves with a fork and spoon, and there is nothing anyone can do to change their minds. It's sad.
BluePlasticStraw hit the nail on the head. Her health is her responsibility, not yours.