Very few women in history have betrayed their sisters to become the king's mistress. Maybe that's why Marie Anne de Mailly, arguably history's worst sister, is so intriguing.
Marie Anne de Mailly: The Manipulative Mistress
Louise Julie de Mailly: The Betrayed Sister
The five de Mailly-Nesle sisters were quite famous since four of them became the mistresses of King Louis XV. Louise Julie should never have trusted her sisters.
The Royal Women 