The Black Sheep and the English Rose — Donna Kauffman

Finn Dalton is the black sheep of his privileged family--because he's always trying to do the right thing. But do good guys let bad girls go free? Ask British heiress Felicity Trent. Finn should have called the cops when he caught Felicity with a fortune in stolen jewels. But after the hot night they'd shared, betraying her meant he'd never have her again. Two years later, he discovers Felicity scantily clad and handcuffed to a bed in a posh Manhattan hotel room. Finn has three choices. Turn Felicity in. Turn her loose. Or turn her on...
Finn Dalton is bad boy personified. Felicity Trent should know; she's a bad girl herself. But for Felicity, life as a jewel thief is almost as seductive as Finn is--and that's dangerous. Because for a girl like her one night is all she needs to get what she wants, anything more means trouble. Now, with both of them after the same thing--the rarest of treasures--who gets there first might be the last thing they want...