Kate Moss' nanny has reportedly quit because the star's party lifestyle made her job impossible. Jade Davidson, 22, handed in her notice after she was forced to work 24 hour days and remain constantly on call for the supermodel. Davidson, who is the sister of Moss's friend Sadie Frost, looks after Moss' five-year-old daughter Lila Grace but is sick of her mother's demands. A source tells British newspaper the Daily Star, "Jade is very attached to Lila and will continue to look after her until January. Kate offered Jade a pay rise but she turned her down. With Kate, life is spontaneous. "One afternoon they are going to Paris, next week it's America. Kate isn't happy Jade's leaving but there's not a lot she can do."