The Scandal at 23 Mount Street (An Angela Marchmont Mystery Book 9) by Clara Benson

When an unwelcome figure from her past turns up unexpectedly, Angela Marchmont has no idea that she is about to become the most notorious woman in Britain. Forced to reveal secrets she has kept to herself for many years and which she had thought were safely buried, Angela faces a fight for her very life which she looks almost certain to lose without the help of the man she loves. But what hope does she have when the one man who can save her is the one man who has every reason to abandon her to her fate?