Complex sentence: Her husband had acquired paintings by their fellow Belgian, René Magritte and in 1936 Magritte painted Suzanne Spaak's portrait but her privileged lifestyle was about to change with the onslaught of World War II and the subsequent occupation of France by the German army.
Split into simpler sentences: Her husband had acquired paintings by their fellow Belgian, René Magritte, and in 1936 Magritte painted Suzanne Spaak's portrait. However, her privileged lifestyle was about to change with the onslaught of World War II and the subsequent occupation of France by the German army.