Just this One Summer by Clare Connelly

On the coast of Italy, sheltering in a stranger’s home to wait out a storm, heartbroken Maddie Gray throws caution to the wind for the first time in her life and ends up in the powerful tycoon’s arms…and bed! The next morning, she discovers her knight in shining armour is the last man she should have got involved with: Nico Montebello. The best friend of the abusive ex Maddie’s spent months trying to elude.
He’s completely forbidden, but when Nico – who has no idea who Maddie really is – suggests a brief summer affair with no strings, no questions, and no future Maddie wonders if she can have her cake and eat it too. After everything she’s been through, she deserves a bit of fun, doesn’t she? So long as she doesn’t let her heart become involved…
But even casual flings have the power to heal and gradually Nico pieces Maddie back together until she’s whole once more. He’s rescued her – from the storm, from her grief and fears, but can he ever forgive her for keeping the truth of their connection from him?