Well it's likely true but you should assume she's related. My Mothers Grand Mother was something like 4th or 5th in line for the Throne and I assure you, everyone around them from the ones folding their socks to the Groom of the Stool is a Cousin. Heck, my Parents married someone who they were certain weren't related but it turned out even though my Fathers Family had been in the USA for a few Hundred Years at least they still were from the same group of Families. You just can't fucking escape I tell you, it's like some unseen force that draws you to a certain Blood.