Went to school with one of the daughters. The joke she had growing up was that she lived in a big white house on a hill where her father, a Carter, was the (bank) president.
Her house had since been sold to become, and I believe it is still now, the Jordanian embassy. King Hussein used to sleep in her old bedroom when he came to town.
EDIT: Nope. Looks like the Jordanian Embassy is back in DC and they're using their old house in McLean for the Tourist Board.