Author note: Sorry for being late to update this week - I had it all ready to go, and them my internet connection decided it wanted to misbehave. Then I kind of... well... forgot. Sorry. OTL
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...

Henry's night-time visits to Zimmerman's room became part of their routine. Mostly they just sat and played video games, or talked over a drink, but occasionally Henry would display the same possessive, dominant side that Will had glimpsed that day in the lab. A hand resting on his leg; dominating positions when they interacted; leading Will's actions when they kissed; and almost always a light cloud of pheromones.

Almost two weeks later, Will was sitting in the library, surrounded by research papers for a new Abnormal they were expecting. It was half one in the morning, and he found himself craving several things – a cup of coffee, salted peanuts (oddly), and – to his own surprise – Henry's company. He'd had to tell the lycanthrope that they couldn't meet up, and had felt almost as disappointed as Henry.

"Screw this for lark." Will huffed, throwing down the file.

One trip to the kitchen for decaf coffee and peanuts (seriously? Peanuts?) later, and Will was stumbling through the corridors to his bedroom. He kicked open his bedroom door, and stripped down to his boxers, ready to collapse on the bed. He yelped at the realisation that he was not alone. Henry lay curled on his side, sleeping until Will's cry disturbed him.

"Hey." The werewolf sighed.

"Hey." Will blinked. "What are you doing here?"

"Can't sleep unless I see you first." Henry yawned. "Gotta make sure you're still in one piece." He sat up, and stretched. "Gotta look after the pack. I'm off to bed then." He climbed off the bed, only for Will to grip his hand.

"You may as well stay here the night." He muttered, tugging the sleepy man back down to the bed with him. Henry followed willingly, and was asleep again the moment his head hit the pillow. Will lay down beside him, mulling it all over. Henry's hand was resting on Will's hip, palm warm through the material of Will's boxers.

Whatever it was that was making Henry act the way he was being, Will wasn't sure he liked it. Clearly the wolf was dominant, and was trying to assert its dominance over its mate. Will, however, knew his own issues. He suppressed a short temper until he was forced into a violent outburst; he was terrible with unwanted authority (one of the main reasons he liked Magnus – she allowed him more or less free reign); he could be a tad promiscuous (unlike Henry, whom he could never recall mentioning a partner before this, Will had been with several women long term and had a dozen short flings and one-nighters since starting at the Sanctuary); and most importantly, he was straight.

The idea of being with another man had never even crossed his mind until Magnus approached him with Henry's problem. The pheromones had been a wonderful discovery – they meant that Will could just sit back and allow what was happening to happen. It felt damn good, he admitted, but he didn't know if he could ever kiss the man without the hormones interfering, let alone sleep with him.

If Lycanthropes, or at least werewolves, mated for life, then Henry was trapped in what was essentially a loveless marriage. Will had no qualms about helping his friend out, but he never signed up for a relationship with him. If that was what they were into, then Henry would have to accept that Will wanted little or no part of it when he could avoid it, and would find a woman whenever he chose to. The dominance was the problem. The wolf was making Henry possessive of a man he couldn't keep, and who was naturally dominant himself.

But what really worried Will was that evening in the lab. No pheromones, and yet a single kiss – steamy though it may have been – had aroused him. Will didn't really know how to take that. He was being forced to reassess his sexual identity all because of a favour.

Will sighed, then twitched as he felt Henry slide closer, the hand on Will's hip sliding down to land on his lower back. The smaller man settled against Will's body, tucking himself against the psychologist's chest and snuggling under his chin.

Zimmerman smiled wryly. He had to admit though, the pure devotion Henry was offering was hard to deny. Human nature alone encouraged him to try and return the feelings.

TBC