The Rented Bride by Tarah Scott

Billionaire Trent Weston dominates in the boardroom, but when it comes to the bedroom he’s discovered it’s dangerous to trust a woman. Now, with his grandfather’s health failing, Trent is determined to make the older man’s last days special…even if that means marriage.
Event planner Cassie Adams is determined to make her mark. However, the Weston party isn’t going as she’d hoped. One disaster after another is going to get her fired. So imagine her surprise when Trent Weston proposes marriage. Only he doesn’t want forever. He just wants to rent her.