All Through the Night by Kate Hoffmann

She wanted one night

Nora Pierce needs to get a life—a sex life. She hasn't had a single relationship since she took over writing as Prudence Trueheart, the newspaper's stuffy etiquette columnist. So she decides to do something Prudence would never dream of—don a disguise and seduce the first gorgeous guy who crosses her path. Only, that guy turns out to be the one man Nora can't have...

He wanted forever

Sports writer Pete Beckett doesn't know what game Nora's playing, but he's definitely enjoying it! After all, he'd spent months trying to connect with his sexy, uptight co-worker. Now she's suddenly setting his sheets on fire every night—and pretending to be somebody else during the day. But Pete knows exactly who he has in his bed—and he's intending to keep her there indefinitely...