Cry of the Wolf by Karen Whiddon

Jewel Smith has lost an integral part of herself – her ability to shape-shift into a wolf. She will die if she doesn’t change into a wolf soon, but who has time for that when she’s on the run from the dangerous mobster who destroyed her gift.
Arriving in Texas, she tries once again to transform. But as she lies naked, half-conscious in a remote field, a handsome stranger finds her. Colton Reynolds seems to be someone who knows about secrets. And he refuses to trust anyone with his.
As her inability to shift wakes burning carnal desires, Jewel must risk everything. If she gives her body to Colton, will she forever lose her shape-shifter part of herself?