Who is Margaret Amir from The Buddha of Suburbia and what is their importance?

Margaret is Haroon's long-suffering wife. She is a sympathetic character, stuck in an unhappy marriage and aware of Haroon's infidelity. Her sons don't really see her. It is devastating to her when Haroon leaves because her sole identity is as a wife and mother, even if she is unhappy in the role. Ultimately, the divorce proves a boon as she is able, once she recovers from the devastation of the failed marriage, to find happiness as an individual.