Immaculate conception right here baby! No seriously...my Mom is 5'8 (and shrinking) and my Dad is 6'1 (but claims he's 6'2 when I'm around). I have no other natural siblings so I can't give you any guesses there but we're Scandinavian and most of the women in my family are at least 5'9 with me being the tallest. My cousin Gretchen is about 6'0 though.
~Linda