Humour in the face of death, part 6

Like most couples who have been together for a long time (50 years in this case), my parents have developed a complex pattern of mutual antagonism and continual struggles over control. My father thinks he is control, my mother encourages him in this impression but then quietly works behind the scenes. Of course, my father is not silly and knows what is going on, but being stone deaf he misses the content. This picture says it all:

The only way to cope is to see the funny side of what we call 'Th