Heart Dance by Robin D. Owens

DuFleur Thyme is a scientist who's secretly experimenting with time. She'll allow no distractions from her work-not even from a HeartMate. Meanwhile, Saille T'Willow has sent his HeartGift out into the world in hopes of finding his HeartMate, who, it turns out, is DuFleur. Still, DuFleur wants nothing to do with Saille, especially when she discovers that it was his grandmother who brought about her father's ruin. Unfortunately, her body can't help but submit to the passion he stirs in her. But when a scandal threatens Saille's position as head of the family, will DuFleur stand by his side?