The Mistaken Billionaire by Lexxie Couper

Thomas St Clair is used to getting exactly what he wants, when he wants it. So when a mysterious woman shows up at his door with his runaway dog and her presence drives away his writer’s block, he’s willing to put up with her secrets if it means she’ll stay around. Mila Elderkin once had a promising career in journalism, until her dreams were shattered by a rising star in the literary world.

When fate lands her at that same man’s door years later, and he doesn’t recognize her, it seems she’s been offered a chance for a little fun. Mila’s not out for revenge, especially not once she starts to see the man beneath the persona. But the past has funny way of creeping into the present, and secrets don’t lie quiet forever.