<P> Subsequent chapters expound on how the arrangement came to be: the children's stepmother, Parwana, grew up as the less - favored child to her beautiful twin sister Masooma . One day, in a flash of jealousy, she caused Masooma to suffer a debilitating injury that resulted in paraplegia . Parwana subsequently spent several years caring for her sister until the latter asked her to help her commit suicide and to then marry Saboor . Their older brother, Nabi, left to work for Mr. Wahdati, a wealthy man in Kabul, and became infatuated with his wife, Nila . After Nila expressed dismay about her inability to have children, Nabi arranged for Pari to be sold to the couple . </P> <P> In the ensuing years, Abdullah leaves Afghanistan and Mr. Wahdati suffers a stroke, prompting Nila to take Pari and move to Paris, France . Nabi, while assuming the role of Wahdati's primary caregiver, finds a number of sketchbooks in Wahdati's closet filled with pictures of him drawn before the stroke . Unnerved by the discovery that Mr. Wahdati loves him, he resolves to leave but decides against it after he is unable to find someone suitable to take over for him . Nabi subsequently spends the next 50 years working for Mr. Wahdati . He develops a deep bond with his employer, and Nabi comes to the realization that his purpose is to take care of Mr. Wahdati . Later Mr. Wahdati's health deteriorates further, and Nabi helps him commit assisted suicide by kissing him on the lips and pressing a pillow over his face . </P> <P> Wahdati's neighbors, meanwhile, move to the United States with their children after the Soviet invasion . Cousins Idris and Timur return to Afghanistan over two decades later in 2003 to reclaim their family's property . While there, Timur makes a great show of publicly distributing money to street beggars while Idris privately bonds with Roshi, an Afghan girl who suffers from a horrific injury and whose family was murdered by her uncle . Idris at first promises to arrange for Roshi to undergo the operations needed for her recovery but distances himself from her and Afghanistan on returning to the States . Several years later, Idris comes across Roshi signing copies of her bestselling memoir, which she has dedicated to her adoptive mother and Timur, who paid for her surgery . </P> <P> Nila, now living in Paris, is unhappy for much of her life, taking up a number of lovers and beginning to refer to the plain and practical Pari as her "punishment". She commits suicide in 1974 after giving a detailed interview about her early life . Pari suspects that she is not Nila's biological daughter and plans a trip to Afghanistan to explore her heritage . However, she postpones it indefinitely after marrying and becoming pregnant . After having three children and being widowed at the age of 48, she receives a posthumous letter from Nabi in 2010 detailing the circumstances of her adoption by the Wahdatis . </P>

Who is roshi in and the mountains echoed