Of Mist and Mirrors by Rebecca Connolly

To thine own side be true…

Minerva Dalton is an experienced operative among the Agents of the Convent and not easily ruffled by the nature of her work. But when the first social event of her assignment is interrupted by another operative using the same alias surname as her own, she has to make a sudden adjustment that changes the course of both missions. And that of her life.
Griffin Russell did not expect the surprise that was Minerva when he’d taken this assignment, but he was not about to argue with a woman who was stunning as well as dangerous. He takes up an unlikely partnership with her to protect them both from discovery and failure, and discovers just how skilled and accomplished an agent she truly is.

Working together, can they accomplish both missions and not