Overkill — E.C. Sheedy

Things get complicated for Raven Force agent, Tanner Cross, when he's ordered to assassinate his own boss.
Complicated, because not only is that boss the billionaire mastermind and founder of Raven Force, he's also the father of Laine Derek, the woman Tanner has loved -- on the QT -- for a dozen years.

Laine has some very confused feelings about the sexy and dangerous Tanner Cross, a disturbing mix of attraction and suspicion. When she hears he's coming to London to see her father, both feelings go on overdrive. To be on the safe side, Laine takes a personal interest in her father's security. For Tanner Cross to get anywhere near her beloved father, he'll first have to get through her.
Tanner doesn't see that as a problem.
___________________________________
A short romance, approximately 50 pages.