Can you be a mother and a sex kitten at the same time? Of course you can - provided you wear Frost French. That was the message spelt out by the label set up by best friends, actress Sadie Frost and Jemima French two years ago, at their show at Regent's Park open air theatre last night. For who better placed to give tips on being a sexy mother than Sadie Frost? Although she gave birth to her fourth child, Rudy, less than a week ago, Sadie looked fresh-faced and fit for anything as she took her bows on the catwalk.