Complex sentence: She met Henning von Anstetten (Patrick Fichte) and fell in love with him but he had strong feelings for his half-sister Marie von Beyenbach (Solveig Duda).
Split into simpler sentences: She met Henning von Anstetten (Patrick Fichte) and fall in love with him. But he had strong feelings for her half-sister Marie von Beyenbach (Solveig Duda).