The Judge by Maeve Greyson

When her father betrothed her to a duke, Isobel didn’t worry because Alasdair swore he’d save her. But he didn’t. Then word came her true love had succumbed to the plague. So, she married, and life became a living hell. Now she’s on the run to protect her son from his sadistic father and she discovers Alasdair alive and well, and begging for the chance to keep the promise he made so long ago.
Thanks to his MacCoinnich cousins; Alasdair Cameron is now the successful solicitor of two powerful Highland clans. A respected Scottish gentleman, his comfortable estate in Edinburgh has all a man could ever want. Except one thing. Life is cold and empty without his Isobel. He’s loved her since the two of them were children. But her father gave her to another, and Alasdair arrived too late to save her from the altar. He’s resigned himself to a life alone until his brother Ian talks him into a visit to Château Delatate, Edinburgh’s elite and secretive gentleman’s club, and the beguiling hostess answering the door is none other than his precious Isobel.

Duchess Isobel Cuthbarten never forgot her dear Alasdair’s oath: I’ll never let another take ye. Words of hope until she was told Alasdair was dead. The precious promise burned like salt in an open wound every time her abusive husband forced himself upon her. Now she’s escaped with her son, determined to make a new life. Out of money by the time she reaches Edinburgh, she secures employment as a hostess at Château Delatate. Thanks to the mercy and kindness of the big-hearted madam; Isobel doesn’t have to receive men. As hostess, she makes them feel comfortable in the smoking room until their lady for the evening becomes available. The job provides a roof, food, and a bit of money to set aside. With any luck, she can soon save enough to escape to the Highlands where her son will be safe from discovery. But then Alasdair walks through the door.