It takes a lot to rattle me, but nothing could've prepared me for the day that Aiden Hennessy walked through my beloved gym doors, ownership papers in his big hands.

I know a lot about my gorgeous new boss, a former fighter whose posters used to decorate my bedroom walls. I know he retired at the height of his fame to take care of his sick wife. I know he's now a single dad raising an adorable little girl. And I know that no matter how broody and quiet he is, my innocent teenage crush has turned into a highly inappropriate adult fantasy.

I would've gotten over it, until one night sparring with him at the gym, it's clear my feelings aren't so one-sided.

It's impossible to pretend I don't want him. Especially when I have to see him every single day, and watch him take care of his daughter.

Aiden thinks I'm too young for him. He says he shouldn't want me.

But all it takes is one step over the line to prove what they say is true- forbidden fruit really does taste the sweetest.