A Lady Never Tells - Lady Be Wicked, #1

Eden Barrett, the Countess of Moreland, is a young widow. Her foolish husband died in a duel, after having an affair with her closest friend. With one affair her entire life changed. Having freedom for the first time in her life she embraces it. Roslyn, her sister by marriage, is about to debut and Eden is her chaperone, and she's determined to aid her to find a husband that won't disappoint her. Maxwell Holden, the Duke of Carrington has decided it is time to find himself a wife.
He has a list of requirements and Lady Roslyn Barrett is the perfect candidate. There is only one problem: her chaperone. Something about her is oddly familiar, and he's more drawn to the young widow than he likes. The more time he spends with her, the more he can't stay away. Eden is determined never to marry again. Especially to the Duke of Carrington. She has a secret though and if he discovers it everything will change.
They've met before, and she's determined he never realizes exactly how they're acquainted. Secrets don't stay buried though, and this one is about to come to the light.