Three young people, possibly cousins, possibly orphans - two girls and a boy - are brought up together. One of the girls wants to sing professionally in Paris and is disappointed by sleazy management. The other girl is obsessed by her. There was a bonnet drama mini series of it in the late 80s or early 90s.
I thought it was by Daphne du Maurier but I can’t find the right one. If anyone can help I’d really appreciate it!