Wicked Deception by Patti O’Shea

Special Forces Sgt. Kyle Winter’s vow to stay far away from the nun he can’t get out of his head is blown to pieces when he’s assigned to work undercover at the convent. The arms dealer his team is after has been showing too much interest in the place and his captain wants to know why. How hard can it be to avoid Sister Sexy anyway?
Marianna Castillo is desperate. So desperate, she’s disguised herself as a nun, and hidden in a convent. She’s been running for more than two years, staying one step ahead of the arms dealer trying to kill her. He can’t allow her to live, not when she knows a secret that can destroy him. And now he’s watching the convent.
Mari needs help, but the person with the skills to keep her safe can’t be trusted. A mercenary’s loyalty is always for sale to the highest bidder, and the man who wants her dead can pay him a fortune.
But as the arms dealer closes in, she has to make a choice. Keep running or trust Kyle to fight beside her to reclaim her life.