Maybe her mother died and her father married an 18 year old, but then the father also died, so the stepmom married another 18 year old, and all of this within a year?
Then you are talking about step parents, not parents.
Maybe her mother died and her father married an 18 year old, but then the father also died, so the stepmom married another 18 year old, and all of this within a year?
Then you are talking about step parents, not parents.