On man, lung cancer got my granddad also. He would bury his cigarette butts in the garden so that my grandma wouldn't worry about him.

After he passed, she found thousands upon thousands of butts in his greenhouse. She couldn't stop weeping because she knew he hid them from her because he loved her, but also because she was so angry he died.

It's especially sad that your granddad died, not because of his own actions, but the actions of others. :(