Not believable that a woman with 750 things to do would stop everything to sit for hours cleaning some tatty old doll.
Peter's wife Julia was first seen in S2E9 as a woman with shoulder length brown hair, dark thick eyebrows and a beauty mark above her right lip. In this show she is a woman with blonde curly hair, almost invisible eyebrows and no beauty mark. No credit is given to the first actress but they are obviously two different women.