What a Wolf Wants by Terry Spear

Mission turns meet cute when a handsome Red wolf special agent accidentally breaks down the door to the wrong house. Good thing the she-wolf is interested and happy to help him with his case.
Red wolf and DEA Special Agent Ethan Masterson is on a mission to take down the drug gang that murdered his parents. On his last Portland, Oregon mission, he storms the wrong house—one that fellow red wolf Charlene Cheswick rents—and now he’s got a lot to do to make it up to her. And he’s eager to do it!
Charlene has never met an alpha wolf who tries so hard to get on her good side. She’s totally intrigued, but the next thing she knows, she’s signing up to help him with his case. Even though she’s a former homicide detective, this is a dangerous business and a mole in the organization isn’t making life easier for them. They have to take down the gang before they can concentrate on their happily ever after.