While Fedor is acquainting Penny with people whom she should know he states that one of them is "an uncle on your mother's side twice removed." The only family member who can be "removed" is a cousin.
Aunt Gamma is referred to as "Your Majesty", however, this title is reserved for the royal head of state and it is implied that she does not hold that position. The title "Your Highness" could be used instead.