<p>Mathilde Carré, notoriously known as La Chatte, was remarkable for all the wrong reasons. Like most spies she was temperamental, scheming and manipulative ? but she was also treacherous. A dangerous mix, especially when combined with her infamous history of love affairs ? on both sides. Her acts of treachery were almost unprecedented in the history of intelligence, yet her involvement in the 'Interallié affair' has only warranted a brief menti...