The Wrong Man, Harlequin Romance #2397 by Katrina Britt. She loved him, but love wasn't enough. Rachelle should never have married Pete Standring. She'd known he was a Canadian oil prospector, but she hadn't realized it was his whole life. Moreover, she hated oil field living. So she left him to resume the budding career she'd had in London. When she finally discovered she couldn't live without the man she loved - it was too late. If she'd lost him to Nancy Bigland it was her own fault.
Used availability for Katrina Britt's The Wrong Man
September 1980 : UK Hardback
1981 : UK Paperback