Devil to Pay - Liz Carlyle - Bog

"By day, Sidonie Saint-Godard is a quietly elegant young widow who teaches deportment to the unpolished daughters of London's nouveau riche. By night, she is someone altogether different. The notorious Black Angel--so called for her lusciously located angel tattoo--ruthlessly takes from powerful men who exploit, and gives to those who suffer at their hands. Always in disguise, she has eluded capture and her identity remains a mystery"--Amazon.com.