Gigi Hadid has wasted no time in rushing back to work following the birth of her first child with boyfriend Zayn Malik.Taking to her Instagram Stories on Thursday, the new mum shared a short clip as she revealed that her mum Yolanda was taking care of her three-month-old baby daughter, whose name is yet to be announced.She captioned the video: "Back in the office," explaining: "[I] would say back to work BUT being a mama is a job like no other."MORE: Gigi Hadid looks flawless in stunning new