Real Reason why Gigi, Bella Hadid kept half-sister Aydan Nix a 'secret'

Gigi and Bella Hadid have reportedly kept their half-sister Ayden Nix a “secret” for a year and a half for a good reason.

“Bella, Gigi and Anwar have met Ayden and have been in touch with her for about a year and a half now,” an insider spilled to Us Weekly on Friday. “They have welcomed her with open arms and are fully embracing her as their sibling.”

The confidant further told the outlet that it was a “complete shock to the whole family” to learn they had a “biological connection” to a 23-year-old Ayden.

While the supermodel sisters have known Ayden for the past year, they wanted to wait before introducing her to the world.

“They kept this news a secret for the sake of Ayden’s privacy,” explained the source. “The Hadid sisters and Anwar have tried to not pass judgment about the situation.”

“The family wanted to keep things private until Ayden was ready. Gigi and Bella have given her space but are always warm and there for her if she wants to get in touch or see them,” the insider said.

“They don’t see each other often and haven’t spent much time together. Ayden has a lot in common with Bella and Gigi and they have bonded over NYC and the fashion industry. She looks up to the girls a lot,” a tipster added.

On May 29, Gigi and Bella shocked their fans by announcing that they have another sister.

“Over 20 years ago, our dad, while single, had a brief relationship that led to a pregnancy. Aydan was born and raised in Florida, growing up with the man she lovingly knew as her father until his sudden passing when she was 19,” the sisters said in a statement to the Daily Mail.