A/N: Hello once again friends! Here we go again, stepping WAAAAAAAY outside the comfort zone! I wrote this nearly a year ago for my awesomely wonderful friend's birthday. I sent it to her, but was too chicken to post it here. I guess you could say curiosity has finally gotten the better of me. Very curious to know what others think of this. So here it is! It will be four chapters. I hope you like it.

WARNING: VERY HEAVY SLASH! Threesome - Hotch/Rossi/And a special guest! You'll see! *grins deviously* Over 18 only, please! It's rated M for a reason!

Disclaimer - I do not own Criminal Minds or it's characters.

(April 2010 - HAPPY BIRTHDAY TN! THIS IS FOR YOU!)


AARON'S BIRTHDAY SURPRISE

The party at Rossi's was great. It was always fun to get the team together and watch them laugh and enjoy themselves without having to think of the next case. Even more fun when there's a birthday involved, as was the case. But it was getting late and the party was winding down.

"Happy Birthday, Hotch," Prentiss said one more time as she and JJ headed for the door.

"I hope you had a good time," JJ added.

"Thank you," he replied. "This was…oomph!" He nearly had the wind knocked out of him when he was bear hugged by Garcia. "Fun," he managed to squeak out.

"Always great to see you smiling and laughing, Boss-man," she added.

"Thanks, Garcia," he chuckled. "I can always count on you to make me smile."

The girls all left together. Morgan and Reid wished him a happy birthday as well, shaking his hand before also leaving together. Hotch waved as they all pulled away and closed the door.

He felt Rossi's arms encircle his waist and his lips grazed his neck, just below his left ear. He leaned his head back to rest on Rossi's shoulder.

"Happy Birthday, Aaron," he whispered, nuzzling his neck.

"Mmmm, thank you for doing this," he uttered. "This was really nice."

"I'm glad you had a good time. You deserve it."

Aaron turned in his arms and kissed Dave tenderly, lovingly.

"You're too good to me."

"You're worth it."

Aaron's cheeks turned a pale pink as he grinned and averted his eyes. Dave loved how Aaron still got embarrassed whenever he complemented him. Their relationship was no longer in the early stages, but for Aaron, who had never been in a same sex relationship before, the newness still lingered. Being with Dave was totally different than anything he'd ever experienced, and it was wonderfully fulfilling. Dave ran his fingers through Aaron's hair to regain his attention.

"I do have one more present for you."

"Okay."

"But I'm not sure if you're going to like it or agree to it."

"Subtlety has never been your strong suit, Dave. Why don't you just tell me?" Aaron felt himself getting nervous. Dave took a deep breath.

"Derek."

"I'm sorry?"

"Derek is coming back."

His brow furrowed. "Why?"

He was definitely nervous now. He was sure he knew where Dave was going with this, but he wasn't sure how to feel about it.

Dave rubbed the back of his neck. "We both know what kind of guy Derek Morgan is, but even the biggest players get curious sometimes. He wants to know what it's like to be with another man."

Hotch looked stunned. "You two have actually talked about this?"

"Quite a few times, actually. He's curious enough to ask me questions and he's comfortable talking to me. And if he's going to experiment, I'd rather him do it with people he can trust and be comfortable with instead of strangers. And I thought, only if you're okay with it, he could come back here and you and I could show him together. And he and I could give you one hell of a birthday present while we're at it. But if you're not up for this, I understand. I'll call him and tell him not to come back. He knows that's a possibility. There's still time."

Hotch thought about it for a moment. Then started to grin. "You do have a point. And I guess it could be fun. I'm a little nervous about this, but if he's okay with it and you're sure about this, then I'm in."

Rossi smiled gleefully. That gleam in his eye didn't go unnoticed.

"You really have been thinking about this, haven't you?"

"Oh man, do you have any idea what it's gonna do to me to watch him with you while I take you apart?"

"Now you really are making me nervous!"

Rossi couldn't hold back a laugh as he moved closer to Hotch, pressing against him and kissing him hard.

"I can already feel what it's doing to you just thinking about it," Hotch commented on the hardness between them. Rossi laughed harder.

"I'm going to take a shower." He picked up his glass of scotch and drained what was left. He kissed him once more before heading to the master bathroom. Rossi took a deep breath and tried to calm himself. If he was hard already, this was going to turn into a regretfully short night.

Hotch stood under the hot shower. After washing up, he closed his eyes letting the heat relax him while the steam filled his lungs. The more he relaxed, the more his mind wandered to what Dave could possibly have in store for him later. All the possible scenarios running through his head caused his heart rate to rise and his blood to heat up and run south.

"Not just yet," he said, looking down at his newly hardening manhood. "Down boy."

He took several deep breaths trying to calm himself, then did the only thing he could think to do…he turned off the hot water. He groaned as the cold water bit into him, but it had the desired effect. He quickly turned off the shower and dried off.

Meanwhile, Morgan arrived back at Little Creek. He was visibly nervous. Rossi noticed and immediately handed him a glass of scotch.

"We don't have to do this, you know that, right?"

"Yeah, I know," Morgan replied. "I want to. I just…"

"You're nervous. And maybe a little scared. Believe me, that's perfectly normal."

He took a long drink. "You sure Hotch is okay with this?"

Rossi couldn't help but chuckle. "He's about as nervous as you are."

Morgan relaxed a little at that statement. Rossi put a hand on his shoulder. "This is your night, Derek. Whatever you want. We go at your pace." Morgan nodded.

Hotch stood in the doorway watching, wearing nothing but a pair of faded jeans. His towel was draped over his shoulder. His hair was still damp and dripping onto his chest, the droplets glistening in the light from the hallway. His eyes darkened as he watched his lover.

Rossi caught a glimpse of Hotch over Morgan's shoulder and his breath caught. "Damn," he was finally able to mutter. Morgan turned and was surprised at the sight. Hotch was built. Not 'Derek' built, but more so than Derek expected. The scars on his torso were noticeable, however faded, giving him a much more rugged look that made Derek's heart rate rise. He wasn't sure how he felt about that, but he'd made a deal with himself earlier in the day not to question or second-guess himself about tonight. He'd just go with it and see what happened. He certainly didn't expect to be turned on so quickly.

He watched as Dave made his way over to Aaron.

"Do you have any idea what you're doing to me right now?"

Aaron smirked. "I'm just getting started."

He leaned down and placed a soft kiss on Dave's lips. Dave's hands went into his wet hair, pulling him closer and deepening his kiss. They finally parted when oxygen became necessary. They were both panting when Hotch caught Derek's heated gaze.

"Hey."

"Damn," was all Morgan could say.

Hotch chuckled. "Come here."

He did. Hotch put a hand on his shoulder. "Try to relax."

Morgan looked at Rossi. "I thought you said he was just as nervous as I was."

"He was half an hour ago," Rossi shrugged.

Hotch chuckled. "I got over it." He turned serious. "Derek, listen. There are no supervisors and subordinates in this room. I know that's one thing you're worried about. I was too, at first. Don't be worried. Nothing we do tonight will affect the job. It's not Hotch, Morgan, and Rossi tonight. It's Aaron, Derek, and Dave. All you have to do is relax and enjoy the ride."

With one fear put at ease, Morgan finally relaxed a little. Hotch had a gleam in his eye.

"Come on," he said, motioning to the master bedroom. "I've got an idea."

Dave couldn't help but grin at Aaron's eagerness and Derek's nervousness as they followed. This was going to be a fun night.