Complex sentence: Marais decides to leave Madeleine, but she is found to be pregnant; however, the child is still-born and she falls gravely ill. Marais abandons her and she loses the will to live.
Split into simpler sentences: Marais decides to leave Madeleine, but she is found to be pregnant. However, the child is still-born and she falls gravely ill. Marais abandons her and she loses the will to live.