Good Duke Gone Wild by Eliana Piers

She needs an out from London society. She didn’t realize she’d get an in with pirates.
Agatha is the perfect example of how a lady should act in polite society. But when she mistakes a man for a pirate and shares a secret kiss with him, she takes the only logical next step. She climbs aboard his ship.
Jude, the Duke of Sutherton, has escaped the ton for as long as he could. Now he finds himself wrapped around the body of a lady—the likes he swore off—and he’s kissing her like there’s no tomorrow. When she sneaks onto his ship, he really should send her home. Only he can’t, because she drugged him.
Who is this perfect lady of the ton but temptress of the sea? And what does his heart think about her?