How does Waverly's talent lead to special treatment?

As Waverly develops into an extremely talented chess player, she begins winning more and more chess tournaments and is recognized as a prodigy in her community. After winning an important regional chess tournament, Waverly's mother decides that she no longer has to do dishes, and Waverly is excused from doing her typical chores. Waverly's brothers are required to complete her chores, and they complain about their sister's special treatment. Waverly's mother justifies her decision to allow Waverly to skip her chores by telling her sons,

"Is new American rules...Meimei play, squeeze all her brains out for win chess. You play, worth squeeze towel" (Tan, 4).

When Waverly finds it difficult to concentrate in her shared bedroom while practicing at home, Waverly's mother makes her sons sleep in the living room in order give Waverly more space and a silent atmosphere. Waverly also mentions that she is allowed to excuse herself from family dinners without finishing her food. The only duty that Waverly cannot avoid is accompanying her mother to the local Chinese market every Saturday, where her mother shows her off.

Waverly's talent is, of course, chess. When her mother Lindo realizes that she might just have a potential prodigy on her hands, she starts giving her daughter special treatment. First of all, she no longer has to perform boring, mind-numbing chores such as washing dishes. Inevitably, this means that she's resented by her brothers Winston and Vincent, who end up having to do more work around the house as a result.
Then Waverly starts to complain that the bedroom she shares with her brothers is so noisy that she can't concentrate. So Lindo makes her sons sleep in the living room facing the street. Lindo is so keen to encourage Waverly's talent that she starts bending her own normally strict house rules. Usually, it's not considered acceptable for the children to leave the table until they've finished eating. But after Waverly complains that her head doesn't work right on a full stomach, she's allowed to get up from the table, leaving behind half-finished bowls of rice.