One Kiss from Ruin (Harrow's Finest Five #1)
Nancy Yeager

A gentleman marked by a scandal
Mr. Daniel Hallsworth lost his title and was driven out of England by claims of his illegitimacy. Now he’s returned to reclaim his title and his family’s reputation, which requires marrying a virtuous lady. He has his sights set on the woman he once loved. If only the lady would graciously accept his proposal.
A lady haunted by a secret
Lady Emme Radcliffe made a mistake that could destroy her family. To hide it, she’s withdrawn from society and dedicated herself to spinsterhood. Now the man she’s loved for ages has returned with an offer of marriage, but accepting it means risking her secret. If only the gentleman would kindly stop tempting her to fall in love with him again.
A love that could ruin them both
With their own match an impossibility, Daniel needs Emme’s assistance to find a suitable wife, and she needs his help to thwart her father’s matchmaking. But each moment together brings them to the brink of passion, and every stolen kiss brings them one step closer to ruin.