Rod Stewart's daughter RUBY is set to follow in the footsteps of her sister KIMBERLY and stepmothers Penny Lancaster and Rachel Hunter, by modelling for a popular British lingerie company. The 20-year-old brunette, whose mother Kelly Emberg was also a model, has signed with Scottish underwear firm Ultimo. The move comes as a shock after the company infuriated 62-year-old Stewart by replacing Lancaster (his girlfriend at the time) with Hunter, and then hiring his eldest child.