An elderly Cameroonian man asked Fabi to call him "grandpa" and Fabi said, "you're not my grandpa"- which is gratifyingly loyal of him. But I think we need to explain to him that it's entirely natural for a person to have two grandpas. After all, one can't have too many benevolent elderly gentlemen in one's life.
Perhaps if he called the other chap "grand-dad" or "gramps"...
Perhaps if he called the other chap "grand-dad" or "gramps"...