When Hearts Are Wylde by Chasity Bowlin

He was the one man she could never have… until she decided to break all the rules.
One reckless night shatters their restraint and ignites a scandal neither can escape. But when a dangerous blackmailer threatens everything, will love be enough to outwit the shadows closing in?
Miss Hermione Waring vowed to marry only for love—and her half brother, the viscount, supported her in that dream. But after three fruitless seasons, she is resigned to the fact that love may never come. Determined to taste passion just once before bowing to duty, she seeks out the one man she’s secretly longed for: Leopold, Lord Hartley.

Wounded by betrayal and haunted by his past, Hartley has long desired Hermione but has never dared to claim her. When she comes to him, offering herself with fearless resolve, he cannot resist. Yet their stolen nights ignite more than passion—they set the stage for ruin.
When explicit letters between them fall into the hands of a cunning blackmailer, Hermione is forced into a desperate bargain that binds her to a man she despises. Every move seems designed to break her spirit. But Hartley refuses to let the woman he loves be destroyed, even if saving her means confronting the darkness he’s hidden from for years.

Can he release himself from the shadows of his past to seize a future with the woman he was destined to love?