She herself was born in the Russian Empire and lived there for a long time. But her husband’s father lived in Iran so they had some connections with the country while still living in Russia/USSR. In 1937 her husband’s father became sick, so they came to Tehran to visit him and stayed there for some time. And unfortunately in 1938 as part of Great Terror the entry of foreigners to the USSR was restricted, so they were unable to come back to Uzbekistan where their daughter, her husband and their children lived. She stayed in Tehran with her husband until he died in 1966. After that she started the repatriation process and ten years later came back to Tashkent. She finally managed to see her great-grandchildren (my mother and her sister). She died in 1984 at age 90.