Susan Holloway Scott — American Author

Susan Holloway Scott is an American author of historical fiction who also writes historical romance novels under the pen name Miranda Jarrett... (wikipedia)

Katherine Sedley was the only daughter and heiress to the libertine poet Sir Charles Sedley, and grew into a thoroughly scandalous lady in her own right.
Louise de Keroualle, being a Frenchwoman from the French court, was feared by most Englishmen for how she might influence their king, and that fear quickly turned to hatred.
I'm such a history-nerd that, with time for research, I could probably enjoy writing in just about any time period.