The eternal worriers

Amma and Appa, each feeding the other's paranoia. Believing that our man Murphy's theory is based on their lives and that of their only child and her spouse. Perpetually talking about erring on the side of caution, and effectively so far left of caution, that it seems ludicrous. And they have their use cases finely etched, a fifteen year old story that happened to a brother-in-law of a friend of a cousin sister of appa's childhood friend, who appa hasn't spoken to in like years. The story itself is not of significance here - the grainy details of the story though have been exaggerated in their minds by continual discussion, and aspects of it have been created to terrorise their child. The child meanwhile deals with her spouse calling her family, "the hyper paranoids".