Surprised By Love - Blackridges, #2

Jarrett Blackridge's assistant Sasha Reylione is one of them most important people in his life. When she's faced with a threat from her ex-fiancé Jarrett's first instinct is to protect her. His anger forces him to evaluate his feelings for her and admit how strong they were. He's going to do whatever he can to shield her. Even if that means marrying her. This wouldn't be a bad thing, since they got along better than most married people he knew.
Hopefully somewhere along the way she'd realize that he loved her. When Sasha's ex starts causing trouble her boss decides the best course of action is for them to get married. At first she's stunned, but Jarrett is a very persuasive man. She'd spent almost two years seeing to most of his needs so she couldn't see how different being married to him would be. Except for them having sex of course.