The Forbidden Duke (The Untouchables - Book 1) by Darcy Burke

Titus St. John, Duke of Kendal, is known as the Forbidden Duke, a mysterious, intimidating figure who enters Society just once each year at his stepmother’s ball. A decade ago, he was a devil-may-care rake until his idle roguery brought about the ruin of Eleanor Lockhart—and his resulting self-imposed isolation. Now she’s back, and she needs his help. But by “saving” her, he may just ruin her life all over again.