Neville and William were first cousins. They were born within a month of each other. They lived “just down the road” from each other. As kids they did everything together. As teenagers they did everything together. They went through university together. They had their own lives, but they were all but brothers.
When Neville married Heather, William was the best man. When William married Stella, Neville was the best man.
Heather and Stella didn’t like each other. Their husbands stopped socializing with each other. Their lives drifted in different directions.
Neville and William haven’t seen each other for twenty years. They don’t even know the names of each other’s kids.