Here Be Dragons by Jenny Redford

When the league’s players go on strike, the Detroit Bandits’ team owner sends in the best negotiator he knows: his sister. Ava Foster always gets what she wants, both in the board room and the bedroom. In fact, she finds negotiating with men – professionally and personally – to be quite rewarding, but when she’s done with them, she’s done. Her life is too busy to make things complicated with entanglements of any kind.
Shane Taylor takes his job as the captain of the Cleveland Dragons seriously. But with the players locked out, he’s taken on a new role as part of the union’ negotiating team. He intends to get a deal that’s fair to the guys he represents, and the new lawyer that the owners have sent in will have no effect on him getting what they deserve.
Except the owners’ new lawyer is a force to be reckoned with. She’s hot, she’s smart, and her brother owns Cleveland’s biggest rival. Oh, and Shane slept with her. It was a one-time thing before he even knew who she really was. But how will he ever be able to tell the players that he’s falling in love with the enemy?