When two sisters marry two brothers, their children have the same two sets of grandparents. Unlike most people, who have a cousin that has grandparents that you've never met or care about; these cousins share both sets of grandparents. Divorce is very hard for these families, if divorce happens to one set of these parents, every family get-together is a fight between the still married couple, the wife wanting her sister present and the husband wanting his brother present, but neither one of those people wanting to be around their divorce'
Jane Smith wanted her sister Jill Smith to meet her boyfriend, so Jane and Jill decided to set up a double date. When they all met at the restaurant, they discovered that Jane's boyfriend, John Parker, was brothers with Jill’s boyfriend, Joe Parker. Jane married John and Jill married Joe. Their children were double cousins. Now Jane and John are divorced, family get-togethers SUCK!