Complex sentence: It was at this time that his mutual attraction to Lady Emma Hamilton developed in a romantic affair and he began to dabble in Neapolitan politics, combining with Maria Carolina, the francophobe Queen of Naples, to successfully encourage Ferdinand to go to war with France.
Split into simpler sentences: It was at this time that his mutual attraction to Lady Emma Hamilton developed into a romantic affair. He also began to dabble in Neapolitan politics, successfully combining with Maria Carolina, the francophobe Queen, to encourage Ferdinand to go to war with France.