In my defense, I had no clue the gorgeous guy I had a wildly steamy night with was my brother's best friend. Or the single dad of the little girl I was about to nanny.

I hadn't seen Dr. Owen Fritz since I was twelve and he was twenty-four, but even back then, I didn't care much about him.

He was doing his billionaire, master-of-the-universe, medical school thing, and I was too into art and books to notice anyone.

Now he's cold and broody, but he doesn't scare me the way he does everyone else.

He's been scarred, but I've been scarred worse.

We both promise to leave that night in the past, vowing to keep this secret between us and stay professional from now on.

Especially since I'm living with him—sleeping down the hall from him—and his adorable little girl.

Until one night of hell changes everything and all those promises we've been struggling to keep don't just break, they shatter.

Now there's no holding him back.

And the more he watches me with those magnetic eyes or whisks me into dark corners and puts his heated hands on my body, the more I forget why what we're doing is so undeniably forbidden.

We're playing with an unstoppable fire.

And we're both about to get burned.