All Night With A Rogue by Alexandra Hawkins

Notorious, handsome, and decadent, the Lords of Vice prowl the glittering ballrooms of Regency London-- breaking rules and hearts with equal aplomb. But even the wildest rogue must eventually meet his match...

IT BEGAN AS A FAVOR...
Seduce Lady Juliana Ivers and then cast her aside: Those are his sister's instructions. Alexius Braverton, Marquess of Sinclair--known as Sin to the ton--is happy enough to oblige, especially when he catches a glimpse of his target. Juliana is completely unlike the empty-headed chits who barely hold his attention for a week. A true gentleman would leave her to find a worthy suitor. But then, a Lord of Vice would never claim to be a gentleman.

WOULD IT END IN FOREVER?
Juliana is expected to marry well to improve her family's finances, even if she secretly longs to make a living through her musical compositions. A dalliance can only complicate matters, though not even practical Juliana can help succumbing to the aptly named Sin. But one unforgettable night will draw her into a scandalous affair--and a seduction begun as sport will soon become deliciously, dangerously real...

All Afternoon with a Scandalous Marquess by Alexandra Hawkins

Simon Jefferes, the Marquess of Sainthill, has done the unthinkable—he’s fallen in love. The so-called “Saint” has spent his life gambling, dallying with women, and satisfying his every whim. And he fully intended to continue his wicked ways, until he met the mysterious, exotic, and irresistible Madame Venna—the one woman he can’t have…and the only one he’s ever wanted for more than an evening.
The proprietress of the Golden Pearl, one of London’s most exclusive brothels, Madame Venna takes pride in the lush, decadent club she’s created. With a half-mask to conceal her identity, she’s careful to safeguard something even more valuable—her heart. But Saint is determined to tear down the walls she’s built around herself, and to finally expose the truth—that Madame Venna is a woman very much in love…with him.