Lord Ruin (The Sinclair Sisters #1)

Not believing in love, the Duke of Cynssyr is a changed man after a night of unforgettable passion--but it leaves him tied to a bespectacled spinster. Anne Sinclair had sworn to protect her sister from this infamous Lord Ruin, but she didn't expect to sacrifice her own virtue. Forced into marrying the rogue, she vows never to relinquish her heart. Soon, however, her husband makes Anne long to succumb to the ultimate temptation. Original. Rated '4/5 - Explicit open door' for steam/spice/heat level.