Children of Russian spies had no idea of their Russian heritage

The kids are 8 and 11 and only found out on the plane ride to Russia when their parents were freed that they were not Argentinian. From a correspondent quoted in The Guardian:

They are high-class professionals who devoted their whole lives to the motherland, making sacrifices that ordinary people could never understand. They raised their children as Spanish-speaking Catholics. Now they will have to teach them what borscht is.