On His Terms by Madison Quinn

Fleeing an abusive relationship normally doesn’t lead to a contract.

After being burned by an ex Nicholas doesn’t trust easily. However, his refusal to have a serious girlfriend threatens everything he has spent the last five years working to accomplish. Somehow, instability in his love life has convinced the public that he can’t manage a multi-billion dollar investment firm. If he doesn’t change things quickly, he’ll risk losing everything he’s worked his entire life for.
To solve his problems, Nicholas hires Kenzie to be his pretend girlfriend. With the terms of their contract firmly in place, Kenzie is confident this arrangement will allow her to ditch at least one of the deadbeat jobs she’s endured to keep from returning to the horrors she left behind.

Keeping their arrangement completely professional slowly becomes complicated as attraction rises to the surface. Both of their futures are riding on this arrangement working and neither can afford to lose the other.