The Darkest Corner of the Heart by Lisina Coney

Forbidden.
That’s what they are to each other.
Maddie Stevens has never felt good enough.
Not good enough to keep her parents’ love. Not good enough to be independent and stop being her brother’s problem. Not good enough to build the future she wants.
When she injures her ankle before a ballet audition that could change her career forever, she’s convinced her life is over at twenty-one. What’s the point of having dreams when they can go down the drain at any moment?
And because the universe has a cruel sense of humor, her physical therapist turns out to be a tank-shaped grouch who doesn’t even seem to like her that much. It’s totally unfair that, for six weeks, she’s forced to look at that handsome beard and listen to that deep voice that makes her head all dizzy. Top that with the fact that he’s ten years her senior, and falling for James Simmons is a recipe for disaster.

But when their forced proximity makes the lines start blurring, the forbidden temptation becomes impossible to resist.