His Terms by Jenika Snow

The contract was simple.
Be his for one week and her money troubles would disappear.

It seemed simple enough to Sorcha Case. Cut and dry. She’d be Rian Hartford’s in any way he saw fit, but only for seven days.
But Sorcha should have known nothing was that simple.
Rian was arrogant, ruthless, and brought cold to a whole new level. He was gorgeous, intelligent, charming, and charismatic. He’s dominating and demanding, and infuriates her to no end. Despite the fact that he was the devil in disguise, Sorcha wanted him like no other, so signing on that dotted line was easier than it should have been.
But Rian started to show her a different side, a gentler side that had her falling harder for him. She wanted to hate him, but the longer she stayed with him, the more she gave herself over. Sorcha knew leaving him once the contract was up would be one of the hardest things she’s ever done.

Reader note: This story was previously published under the title On His Terms. Although the story itself is the same, it has since been re-edited, slightly revised, and new content added.