Gigi and Bella Hadid kept their half-sister a secret for a year-and-a-half in order to protect her “privacy”.
The models confirmed their father Mohamed Hadid welcomed another daughter Aydan Nix with Terri Hatfield Dull after his divorce from Gigi and Bella's mother Yolanda Hadid but Aydan did not know about her heritage until the man she thought was her real father passed away when she was 19.
