Article continues below advertisementGigi Hadid is still protective of ex Zayn Mailk, the father of her daughter, nearly four years after their split.On Monday, September 22, the model posted photos from a birthday party she threw for daughter Khai when she turned 5 - but the singer didn't appear in any of the pictures.Article continues below advertisementGigi Hadid and Zayn Malik Celebrated Daughter's BirthdaySource: @gigihadid/instagramGigi Hadid confirmed daughter Khai spent her birthday with both of her parents.