Title: Taken for His Pleasure
Description: Billionaire Anton Santini needs discreet protection...but he's not expecting Detective Lydia Holmes! How can this staid, sober policewoman pose as his mistress? Lydia surprises herself when, made over for her new role, she's no longer plain and frumpy. Now she's beautiful, ripe and ready for Anton to pluck her for his pleasure....

.

Switched, b/c girl guarding guy
And undercover cop
billionaire in distress. , some mystery person has tried to kill him.  detective Lydia would pretend to be his girlfriend, and she could guard him in his hotel suite. Detectives would guard him at all other times, and they even had a detective who’s only job is to tend bar and serve Lydia non-alcoholic strawberry daiquiris, so she isn’t drunk on duty.
Subjects: Fiction, Romance, Contemporary, Modern, Man-woman relationships, fiction, Billionaires, fiction, Policewomen, fiction, Passion, fiction
People: Detective Lydia Holmes, Anton Santini