Author note: Porn and mating habits, anyone?
Warning: Sex, pseudo-science, Henry being emotional.
Pair: William Zimmerman and Henry Foss.
Disclaimer: I do not own Sanctuary, because if I did the ending would be more of an ending, rather than just stopping like it did. Stupid cancellations...

"Will, I know this ain't fair on you." Henry admitted the second the door was closed. "It's not so bad for me, you know? I don't mind being with a guy, but you said yourself that you prefer women. Everything you feel is the pheromones. I'm pretty much a walking Roofie right now." Will snorted and dropped into an armchair.

"Dude, you're not date-raping me. I made the initial choice without the influence. They just help me along the way now I've agreed." Henry's shivering had finally stopped. Will held out a hand. "Come sit down." The werewolf perched on the arm of the chair opposite. "I agreed to help before I spoke to you."

"I'm just glad it's you." Henry admitted, then looked uncomfortable. "I don't mean that in a creepy way. I just... it's... you're..." he sighed. "Don't take this the wrong way, okay?" Will indicated for him to continue. "Usually, I wouldn't even think about it; working with a lover would be really awkward. But you're not exactly hard on the eyes, you know? There's something about you that just appeals to the wolf." A gentle tease of excitement slid across Will as Henry inadvertently released a mist of pheromones. "And to me, I guess."

"I don't know what to say to that." Will crossed his legs, covering his own erection. The lycanthrope's nose twitched, and Will mentally cursed. Of course a werewolf's senses would pick up on his excitement. So much for keeping everything calm. The mist became a veritable fog.

"I think that says it all." Henry smirked. He rose to his feet fluidly, an elegant move that looked out of place on the technician. Will's mouth went dry as the pheromones went to work. Henry was across the room and straddling him before Will could blink. Will hesitantly rested his hands on Henry's thighs, allowing the werewolf to take the dominant role.

Henry slid forward until their hips were locked, then bent to kiss Will. The kiss was hard and deep, and suddenly Henry's tongue was invading Will mouth. The profiler hesitated for only a second, then mentally shrugged – in for a penny, in for a pound – and returned the favour, still careful to let Henry take the lead.

"Let me?" Henry's hands ran down Will's chest to his belt. "I can't wait. I don't want to wait." Will shuddered under the contact. "Will, please. With Kate the way she is, I don't know if I can control it. I'd rather it be with you. The last thing any of us wants is Kate pregnant with unwanted baby werewolves." He bit Will's lip lightly. Will sighed at the contact. "Or me raping her."

"You're right." his hands tightened briefly around Henry's thighs. "That's the last thing anyone wants. And you know what?" Henry tilted his head, quick and curious. "I don't know any other guy I'd even consider doing this with." Will smiled as Henry blinked, surprised, then grinned down at him.

"Alrighty then!" With insane speed and strength, Will was moved onto the floor. The profiler winced a little as his back hit the carpet. Henry was suddenly between his legs as he frantically undid Will's belt and ripped down his jeans. "I don't want to hurt you." The werewolf panted. "Take deep breaths and try to relax."

Will yelped as he found himself face down, flipped over onto his stomach as his boxers joined his jeans. Henry's clothed hardness pressed against his bare ass, and a warm hand slid around his hips to grip his erection. He hissed as wet fingers pressed gently into him, preparing the way for what would come next. Henry let out a quiet groan as he pushed into the warmth beneath him. Will followed the other's advice, breathing through the pain to further relax his muscles.

"Move." He begged after a moment. This was going too fast, far too fast, and they both knew it, but at that moment neither cared. "God, Henry, move." A gentle bite to Will's shoulder made him hiss. The sound changed to a pleasured cry as Henry thrust quickly. This wasn't going to last long. "Again..."

It was hard and fast, so violent it barely seemed anything but rape. Will clawed at the carpet as Henry pounded into him, letting out desperate noises as he came closer to completion. Henry buried his face in Will's heaving shoulders, and gave a muffled yell as he came, hard. Will followed, pushed over the edge by the scalding wave inside him.

Henry didn't have the chance to pull out, let alone come down from their post-coital high, when he was grabbed by the back of his clothes and ripped bodily away. Will swore at the sudden movement and involuntarily curled a little.

When he could move again, Will rolled over. Henry was cowering by the wall, staring down the barrel of two guns.

"Will, are you alright?" Bigfoot was crouching by him. The profiler nodded, and rearranged his clothes. Magnus and Kate were standing over Henry, guns trained on the werewolf. Henry was shaking again, and you didn't have to have Will's eyes to see his fear.

"What are you doing here?" Will stood, legs still wobbly under him. Kate glanced over her shoulder.

"We were keeping an eye on things on the CCTV, as soon as we realised what was going on we got up here as fast as we could."

"And what exactly did you think was happening?" Will shrugged off Bigfoot's supportive hand and pushed past the women. "I consented to everything." He focussed on Henry. "You okay?" the werewolf nodded silently. "We agreed it would be better to try and end his season before Kate was in too much danger. We didn't intend to do it here, but it had to happen." Magnus' eyes were flicking back and forth between the two, then across to Bigfoot. The hairy Abnormal huffed and pulled Kate behind him a little.

"Alright." Magnus lowered her gun. "I trust you. I'm sorry, but I'm sure you can understand why we reacted the way we did." Everyone relaxed, but Henry was still shaking. Will hesitated, in his own mind now the pheromones had stopped, but then frowned and wrapped an arm around Henry's shoulders.

"Henry, calm down. It's alright. Come on, breathe." Eventually, the shaking stopped, and Will realised that Henry was breathing in his cologne. Clearly, he associated the scent with Will, who was now apparently a safe base.

"Sorry." Henry's voice was hoarse.

"No." Magnus shook her head. "We're sorry. We should have known-"

"Not you." Henry cut her off. "Will. I'm sorry."

"I agreed to it, man. It's no big deal."

"Wrong, Will. It's a very, very big deal. We didn't know enough about Lycanthrope mating patterns." He looked up at Will with wide green eyes. Will frowned for a second, then started profiling, only to come up with nothing. Wait...

The expression in his eyes...

"Oh, shit." Will groaned. Henry pulled a wry face. "Werewolves mate for life."

"Apparently so." There could be no mistaking the sheer love and devotion in Henry's gaze. Nothing had changed between them other than that they had now slept together. It was the only explanation there could be. "And I don't think I can fix it, man."

Will found himself touched. Henry had to cope with his Abnormality, the Change, the mating season, and the sudden realisation that he had just bound himself irreversibly to a straight man, but yet he was still concerned with how Will was managing.

"Don't worry about it just yet." He squeezed Henry's shoulders gently before disengaging. "We'll figure it out. For now, we'll just deal with the rest of the mating season, and when it passes, we'll figure out what to do." Magnus smiled proudly.

"Well said, Will. Now, I suggest you two go get cleaned up," the two men turned red as they realised exactly what they were covered in, and who they were talking to, "and we'll all get back to work. We have some guests in the SHU that need feeding."

"Yeah, and I'm down on the schedule for the two AM feeds," Kate's shit-eating grin made Will cringe – that expression was never good, "so you guys can do the SHU." Henry groaned.

"Ah, come on Katie! Give me a break." He whined. "I'm not doing so great here."

"Yeah, you must be feeling bad." She grinned. "It took us less than five minutes to get up here from the lab, and we left the minute you stripped him to the floor. You must be damn quick, Hank." Henry turned red. Will rolled his eyes and walked out, leaving Henry babbling to defend himself. "You don't get away that easy, lover boy!" Kate called after him. "Especially limping that much!" Will kept walking.

TBC