Lyon in the Wild by Diana Lloyd

Her past and his future aligned to meet in the middle at the Lyon’s Den.
Crispin Morgan storms into the notorious Lyon’s Den gambling hell with a single goal: save his sister from her abusive husband, by any means necessary. Desperate, he strikes a risky deal with the infamous matchmaker, Mrs. Dove-Lyon. His end of the bargain? Marry her most impossible bride. The last thing he expects is a fierce, clever woman who hides a knife in her wedding gown.

Nenokaasi “Birdy” Carmody has crossed an ocean to change her future, and maybe the world’s. Half Irish, half Ojibwe, Birdy is no stranger to straddling two identities. When she meets Crispin, hope collides with desperation in a marriage of necessity that slowly transforms into something far more dangerous: trust.