Kate Ferdinand has been celebrating her 33rd birthday while on holiday in Portugal.The former TOWIE star has marked the special occasion with her children and step-children. Taking to her Instagram Story, Kate shared a sweet birthday message she had received from her 13 year old step-daughter Tia. Alongside a compilation of photos of the pair, the teenager had written: "Happy birthday @xkateferdinand "Thank you for being the best mother figure I could ask for, I love you forever and I know my mum is proud of you." After sharing this, Kate added a string of crying emojis and the text: "now I'm crying." Kate also shared a birthday tribute from her step-son Lorenz, 17.