" She gave him a happy look as he followed her out on the water-soaked wooden walk. "This could be fun," she said, then turned, took a running step, and did a couple of back flips—like a middle-school kid at recess. He stopped where he was, lust and love and fear rising up in a surge of emotion he did not, for all his years, have any idea how to deal with.

"What?" she asked, a little breathless from her gymnastics. She brushed her wavy hair out of her face and gave him a serious look. "Is there something wrong?" He could hardly tell her that he was afraid because he didn’t know what he’d do if something happened to her. That his sudden, unexpected reaction had brought Brother Wolf to the fore. She threw his balance off; his control—which had become almost effortless over the years—was erratic at best. "

― Patricia Briggs , Hunting Ground (Alpha & Omega, #2)