Complex sentence: Pierre's sister suggested that she care for his two youngest children, Catherine and Tonine, and after he agreed, the sisters moved to their aunt's house at Saint-Rémy, a village nine kilometers from their home.
Split into simpler sentences: Pierre's sister suggested that she care for his two youngest children, Catherine and Tonine. After he agreed, the sisters moved to their aunt's house at Saint-Rémy, a village nine kilometers from their home.