The Ex by Nicola Marsh

When Britt returns to her small home town in Australia after a decade in London, the last person she expects to confront is her ex, irresistible bad boy Nick.
To close a crucial business deal, she may have to set aside her pride and accept Nick’s outlandish offer: a modern marriage of convenience.
Nick can’t believe the feisty woman who broke his heart is back, and this time, she needs his help. His no-strings-attached proposal is simple. But as their fake marriage unfolds, the line between business and pleasure blurs, and the billionaire soon finds himself falling for his first love.
As each secret between them is revealed, how far will they go to reclaim their lost love?