The mother can be a friend to her daughter by having the same relationship with her as a friend would. That would involve realizing one's mistake and making up for it.
In this extract, the mother yelled at her daughter for picking flowers for her. Soon enough she realized her mistake and went to her daughter's room to patch up with her. She apologized to her daughter for having yelled at her.
This is an example of how a mother daughter's relationship should be, when you fight, you immediately try to solve things and improve your relationship.