Margarita Konenkova lived with her sculptor husband in Greenwich Village and visited Einstein frequently in Princeton during World War II. In 1945 she moved back to Russia, and love letters Einstein sent her reveal that they referred to each other as "Almar," a pet name combining their first names. It has been proven that Konenkova was a Soviet spy whose mission was to influence American scientists. There's no evidence Einstein ever passed any valuable information to her.
Go back to Albert Einstein's theory of infidelity.