Stacey Solomon took to her Instagram stories to lament how quickly her son Rex is growing up.The Loose Women presenter, 33, shared a picture of Rex, four, in his school uniform and joked that he looked as if he was “off to uni this morning.” “When did he get so big?” she wrote: “time really is a thief isn’t it.” In the snap, her son Rex was happily grinning for the camera in his green and grey school uniform, and clutching what looks like a necklace in his hand. Stacey, who recently revealed her family are already getting ready for Christmas, added that she “hopes” all her fans are “OK” this morning as she sent her youngest son to school.