Dd3 is ih year four and since the term has began she's been getting bullied by her classmates (they won't play with her and a friend, they make prank phone calls to the house, deliberately poured juice into her oboe case, refused to clap when her and a friend did a class performance despite clapping for everyone else) because she's made a new friend. Her best (and only) friend moved away in May so she had to make a new one and reached out to the other girl in the class with no friends. The friend is a lovely girl and they seem to really get along (new best friends, apparently).
But I've had other mums approach me and tell me that I shouldn't let Dd3 play with her as they suspect that her mother is a prostitute (basically, because she's young and lives in a not-nice part of town). I laughed it off but they were quite serious. They don't let their children play with this girl and seem to support picking on her. Dd3 is a very nice child and wouldn't dream of dropping a friend (or, it seems, telling me when she's unhappy). The teachers are the ones who tell me what's going on at the school but all they can do is tell the kids off. The parents just don't care and have created bullies because they don't like a mother. These parents are on the PTA with me, on the church committe with me, and I don't understand why they would be so horrible to a little girl.
What can I do? Dd3 just seems to be accepting that people are mean to her and that it's normal.