I bet that her old marriage with rock musician was kind of disaster. It doesn't looks like Ririsa's father was famous or succesfull, I think he was rather minor guitarist, with a great passion, but empty wallet. It can be bearable when you young, but with time and responsibility for a child, its become burden and a more like a form of escapism than work. And who would carry weight of a family on their shoulders in this situation? Right, wife.
So her mother ended up deeply disappointed and somewhat traumatised by rock music etc, you can see it in her eyes. And she does not want to her daughter to end up same way as a father.