Complex sentence: Goebbels had many extramarital affairs, notably with actresses, and in 1938 his wife Magda appeared ready to abandon her marriage when Goebbels had a liaison with a young Czech actress.
Split into simpler sentences: Goebbels had many extramarital affairs, notably with actresses. In 1938, Magda appeared ready to abandon her marriage when Goebbels had a liaison with a young Czech actress.