Hold 'Em - Vegas Top Guns, #3

Daughter of a world-famous motocross champion, and head-on competitor with three brothers, Captain Leah "Princess" Girardi was born with a need for speed. No one tells her what to do, especially not men with chauvinistic "girls can't be fighter pilots" attitudes. That's what ended her brief relationship with Captain Mike "Strap Happy" Templeton. Now, six years later, he's been assigned to her squadron, and whoa damn, he's filled out nicely.
Plus he's cultivated a Zen-like chill factor that pulls at her hormones. Even after four tours, Mike's the new kid in the 64th Aggressor Squadron. That's not the only thing new. Since he last saw Leah, he's learned a few things about himself. A female who outranks him still makes his teeth grind, but in the bedroom he craves the rush of pain inflicted by an adoring, powerful woman. Their reunion is an explosive revelation.
Leah is the beautiful mistress he's been searching for, and she takes to her new role like a natural. But Leah's aware one thing hasn't changed. Loving him is still an all-or-nothing proposition. She's not sure her reckless streak is wide enough to risk her career-and her heart. Though this book is part of a series, it can be read as a stand alone.