How do the experiences of the characters in The Inheritance of Loss by Kiran Desai dissolve the idea of “the West”?

The question presupposes a definition of the West to be dissolved. Originally confined to Western Europe, colonialism and the eventual widespread adoption of Western modes of science, consumption, dress, education, property rights, medicine, and work by much of the world's population, has left the original idea of "the West" blurred and to some degree dissolved by the variety and location of fully or partially Westernized ethnicities and nationalities.
Independent daughter Sai; Biju, the son of her cook; Gyan, Sai's lover; Sai's grandfather, "the judge"; and his wife, Nimi, are mainly ethnic Indians, some with roots in Great Britain prior to their legal or illegal immigration to the United States. While they hold on to the foodways of India, the judge's Cambridge University education leaves him acutely aware of his outsider status even as he simultaneously assimilates Western values—values that made his wife's traditional Indian ways repulsive to him. The judge's failure to adapt is echoed in Biju, who sets off to New York with high hopes, only to end up alienated by a series of kitchen jobs with other illegal immigrants in New York.
Are Desai's characters American? Are they British? Are they Indians? Are they Eastern or Western? Questions of ethnic and cultural inheritance, of identity and transmission, and of the potential conflicts inherent in these multiple identities are raised throughout The Inheritance of Loss, and their complexities tend to dissolve any traditional definition of "the West" in the lives of Desai's characters.