Stach and Brod state that during the time that Kafka knew Felice Bauer, he had an affair with a friend of hers, Margarethe "Grete" Bloch, a Jewish woman from Berlin.
Stach i Brod također navode kako je Kafka, dok je poznavao Felice Bauer, imao aferu s njezinom prijateljicom, Margarethe "Grete" Bloch, Židovkom iz Berlina.