The Way to the Sea by Victoria Connelly

The past is never far away.

When Cate Rivers leaves her husband in the middle of the night with their young daughter, Eliza, she has no idea what the future holds. Taking a live-in position at Hollow House on the Dorset coast, she determines to make a new life for her and Eliza.
But Cate’s new boss, fossil hunter Charles Thorner, could do without the problems of a couple of runaways under his roof. He’s got enough worries of his own, including a painful past which still holds him prisoner today.

As the two of them learn to work alongside each other, secrets are shared and a new closeness is found, but they soon discover that you can only hide from the past for so long…