Complex sentence: Known for her beauty, wit and horse-riding skills, she was both a favourite model of Sir Joshua Reynolds and an aspiring actress, although originally a milliner, but would become best known for her high-profile affairs with men of wealth.
Split into simpler sentences: Known for her beauty, wit and horse-riding skills, she was both a favourite model of Sir Joshua Reynolds and an aspiring actress, although originally a milliner. With a flair for publicity, she became best known for her high-profile affairs with men of wealth.