How does jing-mei "win" the disagreement over the piano lessons?

she appeals to her father, who takes jing-mei's side.
she shocks her mother by mentioning the dead twin babies.
she agrees to play the piano in a talent show.
she asks her mom to give the piano to old chong as a -you present.

Jing-mei "win" the disagreement over the piano lessons when she shocks her mother by mentioning the dead twin babies.

The story “Two Kinds” reflects on the relation of a mother and her daughter who had been brought up in different cultures. Suyuan, Jing-mei's mother wanted her to become child prodigy of America. Suyuan tests her daughter in different activities restlessly. She gives Jing-mei piano lessons too. Jing-mei too tries hard but fails. Jing-mei wants everyone and her mother to accept her as she. Her mother was not ready to accept her as she is in reality. In anger and distress, Jing-mei shouts at her mother by saying that she would have been very happy if she too would be dead as her twin sisters.

im not to sure