Birthday Girl by Penelope Douglas

Jordan has nowhere else to go when her boyfriend offers to let her move in with him and his dad. Working a dead-end job, with her relationship sputtering, she jumps at the opportunity, expecting to help out around the house in exchange.  What she doesn’t anticipate is for her heart to race every time Pike pulls into the driveway, or to burn when their eyes meet over the breakfast table. He’s kind and listens to her and protects her in a way no man ever has before. Her sister once told her there are no good men, and if you find one, he's probably unavailable. Only Pike isn't the unavailable one…she is.

As the days go by, Pike’s finding it anything but simple to have his son’s girlfriend living in his house. He can’t stop thinking about her and holding his breath every time they cross paths. It feels like she’s becoming a part of him. Except he knows they’re not free to give in to this. How could they when he’s her boyfriend’s father?