Primal Surrender by Faith Sloan

Alex has one rule: never stay the night.

As a Will-o’-Wisp who escaped the supernatural nightlife, he knows better than to get attached. Then his one night stand hunts him down.
One scorching encounter should’ve been enough, but between the ropes, the marshmallows, and…the toys, Alex finds himself bound in ways he never expected. As things heat up between them, shadows from Alex’s past threaten everything.

Now Alex must choose: keep running, or finally surrender to the hunter who’s claimed not just his body, but his heart.