The kiss four days earlier had surprised him, but the way the memory of it kept returning again and again was more disturbing. Even as friendship bloomed between them, there was a simmering undertone of desire he wasn’t sure how to deal with. Solving puzzles was what he did best—and this should be no exception. Especially when the investigating was so pleasurable. He reveled in her sweet taste. Chelsea softened in his arms, wrapping her hands around his torso until her fingers splayed across his back. He felt her nails like a kitten’s claws against his skin as her hands traveled in slow sensual circles. Their kiss stayed gentle even as the heat between their bodies grew. An experiment or not, the tension between them was enough to make his cock rise with interest. He breathed in deeply through his nose to take in as much of her as possible at one time. Her taste, her scent, the touch of her skin under his hands. He tugged her blouse loose from her jeans, skimming his palms over the warm flesh at her waist, and she purred into his mouth.