Temptress and the Lyon by Tanya Wilde

Twelve years ago, Alyssia Prudence Whitcombe lost the man she was promised to marry since birth and learned how swiftly hearts can be broken. Now, with scandal snapping at her heels and her family’s future at risk, she makes a desperate choice: She will find a stranger to wed at the most dangerous gaming hell in London. A marriage of necessity. A contract. Nothing more.

She never expects that stranger to be Giles Bishop, the boy she once loved, the heir thought dead, the man who vanished without a trace.

Theodore Giles Bishop has spent years in the shadows, waiting for the moment he can reclaim the life that was stolen from him. Hardened by exile and secrecy, he means to bide his time, until he spies Alyssia standing in the Lyon’s Den, wagering her future with breathtaking courage. He makes a reckless choice: He will win her hand or die trying.
But some choices open old wounds.