Claire Rayner 
Long Acre (Book 6 of The Performers) 

Orphans Amy and Fenton arrive in London determined to find fame and fortune on the stage, like their grandmother, the legendary Lilith Lucas. However, Amy also harbours another desire – to discover her family. Her search is destined to rekindle a feud that has smouldered for years. While she cannot fully understand the intricacies of the hostilities, she can not deny her passionate feelings for a man who has a connection with both families.