Bare Knuckle - Vegas Top Gun, #5

After a near-fatal plane crash, fighter pilot Captain Eric "Kisser" Donaghue is a changed man. By day he labors to regain his confidence in the cockpit. By night he moonlights as an off-Strip boxer, fighting for prize money to pay for his younger brother's third stint in rehab. In the ring, no one cares he once had a face that launched a thousand one-night stands-and neither does Eric. He's only there to win.
Yet he can't take his eyes off the new ring girl, a glitz-meets-pageant-queen vision of blonde perfection. Down on her luck but not quite out, Vegas showgirl Trish Monroe lives for the spotlight. The scarred, steely-eyed loner who stares at her from his corner of the ring gives Trish an extra reason to strut her stuff. Curiosity and the temptation of a no-strings good time bring them together. The discovery of their secret fetishes-she likes to show off, he likes to watch-turns mere sexual chemistry into a fiery exploration of matched passions.
They're a natural fit. Trust in love, however, is harder to earn than trust in bed, especially when this beauty and beast hide even from themselves. Though this book is part of a series, it can be read as a stand alone.