Disclaimer: All recognizable characters and themes are the property of Rick Riordan from the world of Percy Jackson and the Olympians. I am not making any money from this work of fiction. I'm just playing around in his sandbox.

Happy Belated Birthday, Nico!

XxxX

Nico's hanging out in the infirmary, waiting for Will's shift to end, just leaning against the wall beside the desk, blending in with the shadows. He can hear murmuring coming from behind a partition, but can't make out the words. He can see Will and another camper's silhouettes through the fabric blocking the exam table from the rest of the room and figures it's going to be a while when Will appears to be selecting an assortment of supplies from his portable cart.

Glancing at the desk, Nico spots a medical textbook, open and face down, its spine bent and nearly broken. He picks it up and starts reading, his face heating up as his eyes fly across the title Prostate Health and Massage Techniques. When he reads the words: carefully crook the inserted digit in a come hither motion, Nico shuts the book and drops it on the desk like it's burned him, his face in flames, his pants tight.

"I'll be out in a sec!" Will calls, shocking Nico to the realization he's just given away his presence and – he looks back at the book, his lip curling – lost Will's place in his textbook. It will be so obvious that Nico's just been reading about … that procedure and he snatches the book up again and thumbs through the center pages until he locates it, then replaces it facedown. There. At least he covered his tracks. And none too soon as Chiron wheels into the infirmary behind him to take over for Will.

Nico studies the ground and blends in with the shadows on the wall as he passes, then ducks out the door, figuring he'll catch up with Will after he finishes.

XxxX

It's only a few minutes later when Will meets him on the big house porch.

"Hey, there you are!" he says, throwing an arm around Nico's shoulders and squeezing him in a sort of half-hug. "Have you thought any more about what you want for your birthday? Eighteen is a milestone year."

Nico feels his face heat up, but covers it with a scowl. He couldn't give a rat's ass about his birthday and has attempted to make that clear to Will half a dozen times already.

He shrugs out of Will's embrace, but takes his hand to keep him from pouting. "C'mon, lets go back to Hades cabin before anybody notices."

It isn't that he doesn't want to be seen holding hands with Will, he's gotten over most of his hang-ups since they've been going out the past three years, but if they hurry, they might avoid being asked to supervise the younger campers and with Will's infirmary rotation, it's hard to find any time alone at camp.

As they walk across the green, Nico releases Will's hand and falls behind while Will natters on about their plans to attend the University in New Rome the upcoming fall. He can't help himself, his mind is still back on that dratted textbook. The page it was open to, the bent spine, he wonders if Will has ever performed that procedure on anybody in camp. He frowns. It shouldn't bother him if it is a legitimate medical thing, but for the life of him, he can't fathom why any young demigod would require it. He's not jealous or anything, he tells himself. It's not like doing butt stuff is something he wants. But it has been three years and Will has never brought it up.

And then he walks into Will who has stopped in his tracks. He's looking at Nico with a raised eyebrow and that godawful gleam in his eyes that means Nico has some explaining to do.

"Alright, spill. What's freaking you out tonight?"

"Nothing," Nico says. "Why would you think I'm freaking out?"

He turns to look as Will points behind them, then furrows his eyebrows at the sight of his own footprints in the form of dead and blackened patches of grass.

He turns back and bumps Will's arm as he starts to move past him. "It's nothing, drop it."

But Will grabs him by the belt loops and pulls their hips together, making Nico flush. With their faces close, nearly touching, Nico can smell Will's tropical scented shampoo and it relaxes him. He huffs, going for indignant, but it comes out sounding aroused, more so than he thinks he ought to be. He stops Will from asking him about what's going on in his mind by kissing him right there in the middle of the green.

XxxX

The following night, they're hanging out in the rec room, watching Titanic, and instead of paying any mind to the movie, Nico finds himself shifting uncomfortably on the couch, his mind again dwelling on what it would feel like to have Will's fingers up his ass, moving in a come hither motion. Sometimes he really hates his hormones for making him hard every time the idea breezes by. Several times a day.

Will brings him back to the present by grabbing his hand, his eyes wide and glued to the screen. Nico looks too, trying to focus on the movie and failing. Instead, he pulls his handkerchief out of his pocket, tucks his arm around Will, settling against him. He's prepared to hand it over when Will starts getting weepy. He's just happy to be close, enjoying the movie in his own way, tending to Will's tears.

XxxX

Afterwards, when they're safely back in Hades cabin, Nico gasps as Will kisses up his neck, his thigh wedged between Nico's legs, pressing against his groin, and breathing hot and heavy. The scent of arousal is thick in the air. If Will keeps going like he is, Nico's going to come in his pants.
He squeezes his eyes shut, lips trembling, trying to drown his tortuous brain, to turn off the idea of butt stuff and be satisfied with their usual exchange of handjobs. The last thing he wants is to embarrass himself in the heat of the moment by asking about it. He bangs the back of his head against the door of the cabin. Why is he so drawn to the idea? Shouldn't it disgust him? Is he turning into a depraved pervert?

He's cold all of a sudden and opens his eyes. Will has stopped kissing him, and taken a step back, his forehead creased in the middle as he studies Nico.

I"What? Why'd you stop?" Nico asks, reaching for Will's hips and pulling him back until they're back where he wants them to be.

"You didn't seem to be into it," Will murmurs against his neck, just under his ear. He pulls back until they're face to face. "You've been different the past few days. Is it because I keep pestering you about your birthday? I keep thinking I'm doing something wrong."

Styx! Why does Will have to be so observant all the time? "What? No. It's not…"

And then Will takes his hand and pulls him across the room to his bed. They sit side by side on the edge. Dread pools in Nico's gut, his arousal waning. Stopping to talk midway through a heavy makeout session can't be a good sign. He looks over at Will, at the severity of his expression.

"Talk to me. If I'm not doing anything wrong, why does it feel like you're pulling away, shrinking back when I'm ramping up?"

Nico's face is in flames. He's going to have to just spill it. Being with Will for as long as he has has taught him that hiding his insecurities or assigning judgements to Will always backfires like nothing else. He's had to dig himself out of a hole dug from doing just that more than a few times. He's surprised Will stuck around despite the pitfalls, ready to hear Nico out when he finally decided to talk about it. His heart flutters when he looks into Will's eyes. He's got it bad for this guy. He takes a deep breath and releases it.

"I um, I dunno ... I was thinking … All right. I'm just going to say it." He narrows his eyes at Will. "No judging."

Will nods, but Nico can tell he's completely puzzled. Nico stares at his hands in his lap. "The other day, I was waiting for you to finish up in the infirmary and I picked up the book you had left on the desk. I started reading it …"

Will makes an odd sound, like he's clearing his throat and trying to swallow at the same time. "The chapter on prostate health?" he chokes out, his voice growing higher-pitched toward the end of the sentence.

Nico looks up at him, smiling despite his own embarrassment at the sight of Will's face blushing pink and looking like he's trying his damnedest not to act embarrassed. The fact he's completely failing at it, actually bolsters Nico's courage to keep talking.

"Yeah. ... and I can't get it out of my head." He looks away, focused on the shimmering reflection of the greek fire torches in the obsidian floor.

Will makes a grunting sound. Nico looks over to find him squirming, pulling a leg up on the bed, like he's trying to do anything to get comfortable. Dropping his eyes to Will's lap, Nico understands why; Will's still incredibly turned on and he's trying not to scare Nico off by downplaying it. It has the reverse effect. Nico's heart picks up again, his body thrumming with adrenaline, with desire.

"Did it … I mean. I haven't actually … " Will exhales as if he's rolling his eyes at himself. "I've never done that to anybody. It's not the sort of thing that would likely ever come up in camp … I just." He takes another deep breath. "It's just like, something that ... I'd like to, you know … someday."

Nico raises his eyebrows, smirking. Will tries to come across as confident in front of other people and mostly succeeds, but he's got insecurities that run just as deep as Nico's and it's a comfort to see them. It makes Nico feel like he's not the only one looking like an idiot in an effort not to.

"You'd like to what, Will?" Nico asks, a smile slipping onto his lips. He puts a hand on Will's thigh, smiling wider as he watches Will's adam's apple bob.

"I don't want to do anything that will jeopardize what we have." Nico nods his appreciation. "But I think about sex … a lot. And one day … Oh gods." His face goes bright red.

Nico leans over and bumps their noses together, just a nudge, relieved as anything to feel Will's hands settle on his hips. "I do too. I want to do it."

Will wets his lips, breathing faster, and Nico pushes him until he's lying on his back and climbs on top of him, tucked between his legs.

"What …" Will breathes. He moans, eyes rolling up as Nico shifts his hips and presses their groins together again. "What do you want to do?"

Nico smashes their lips together in an all-consuming kiss, his body overheating, and then drops his face alongside Will's and whispers in his ear. "I want to have sex. I want to find out what's so great about this prostate thing, why I can't stop thinking about it even though my brain is telling me I shouldn't."

Will chuckles, his breath huffing over Nico's cheek. "Don't listen to that part of your brain." He shifts his hips upwards, making the urge to grind until they come return in sharp relief throughout Nico's whole body. "Oh!" Will says, panting, hands gripping Nico's hips tighter and bumping their groins together harder and faster.

Nico holds onto the sides of Will's head, hands in his hair, his face shoved into the hinge of Will's neck. He pushes his hips back, taking control of the pressure until Will cries out, stiffening underneath him and setting off Nico's own orgasm. It crashes over him, his hips jerking as if they have a mind of their own, bucking against Will until he's totally spent and sticky.

His body still shuddering, Nico rests his head on Will's chest, coming back down. "I know what I'd like to do for my birthday."