The full moon hung low and swollen over the Blackwood Forest, its silver light filtering through the cabin windows like liquid mercury.

Mark woke suddenly, his body burning from the inside out.

A deep, unnatural heat surged through his veins, making every muscle twitch and spasm. Sweat poured down his chest even though the room was cool. His heart hammered like a war drum. Between his legs, his cock was already rock-hard and throbbing painfully, far harder than it had ever been, even during their passionate sex earlier that night.

“Sophie…” he groaned, his voice already sounding rougher, deeper. “Baby, wake up… something’s wrong with me.”

Sophie stirred beside him,...