Lacey’s Daddy by Paige Michaels

Lacey’s life sucks. She has lived with her father ever since her mother died when she was a child. Over the years, he’s gotten more and more abusive toward her. Her only escape is her visits to the Dungeon on the nights he is not home.
Brian is a nurse who lives on the island. He visits the Dungeon on the mainland every chance he gets, mostly hoping for a chance to see Lacey, even though she never meets his gaze. He’s determined to get her to talk to him, and he won’t give up until she does.
When Brian arrives at the Dungeon to find Lacey injured and scared, all bets are off. She’s going to talk to him whether she wants to or not. And this time, she’s going home with him.