Later Peter learns the truth through a letter of Claire , as she wants Charlotte to know her real father ( and Peter 's name on the birth certificate ) .
Peter Johnson is the father , but initially it is claimed that Alex is the father .
Later father learns the truth through a letter of Claire , as she wants Charlotte to know her real father ( and father 's name on the birth certificate ) .
Peter Johnson is the father , but initially it is claimed that Alex is the father .