Siren of the Highlands by Kenna Kendrick

The poison that brought them together will intoxicate their senses…
Ivy Welton was lucky enough to be born a Lady. She had everything she wanted when she wanted it. But upon her visit to Scotland, she will discover that a Highlander cannot be bossed around. Nor can he be trusted with her darkest secrets.
He can be trusted though with her darkest cravings…
Fin Begbie must discover the person behind the poisoning of his Laird’s wife. His investigation takes him to the Duke of York’s castle, and there, while he should be focusing on his mission, Fin falls under the spell of a spoiled Sassenach.
As they come closer, sparks are flying and suspicions arising. What if this woman knows more about the poisoning than she admits to?
Now, Ivy must control her moves in someone else’s deadly game before Fin finds out the truth, and she loses everything…
Can the glass be mended after it has been shattered?