Act of Submission by Mandy Roth

Paranormal Shifter Military Special Ops Romance
Haven Carey has given up everything to seek out the man responsible for her brother's death, but she gets a lot more than she bargained for when she comes face-to-face with the tall, dark, and delicious alpha. When her world is turned on its head, she soon discovers that nothing is as it appears to be.
Cat-shifting PSI-Operative Miles "Boomer" Walsh is the team loner for a reason-nothing and no one touches him. Not anymore. Except when a beautiful vixen shows up, claiming he murdered her brother, and tries to kill him. It's not the first time a female's tried to end him. But this time is different. Primal instinct demands his total surrender to whatever the woman has in mind... especially if that something includes a little pain mixed with pleasure.