Bride's Necklace Kat Martin

Knowing that she alone can protect her sister from the Baron Harwood,
their lecherous stepfather, Victoria Temple Whiting snatches the
family's heirloom necklace, believed to hold the power to bring great
happiness or terrible tragedy, to pay for their escape to London.
Terrified that the baron will find them, Victoria poses as Tory Temple
and finds employment as a servant in the household of handsome Cordell
Easton, the scandalous Earl of Brant.

The sisters' arrival
couldn't have been more welcome. In need of a new mistress, Cord turns
to Tory, whose wit and intellect intrigue him. But when the baron
discovers the girls' whereabouts, Cord learns Tory's secret – her noble
birth. Furious that he has compromised the daughter of a peer, Cord must
decide – marry Tory and keep her safe, or allow his stubborn pride to
deny his heart.