This is nothing more than a bit of smutty mangasm. If you're here for something deep and relevant to the Mass Effect canon well bad news. I will go over all the relationships that intrigue me (some of them not available but whatever we'll just pretend Jacob and Vega are secretly batting for the same team).

"You did what?" Vega exclaimed, so surprised by this that he actually stopped exercising.

"You heard me, James. It was great, I can't believe someone as submissive as him managed to beat you in a fist fight" said Kaidan.

James laughed, "Loco, completely loco. So why are you telling me this Alenko?"

"I have an idea that involves you"

"I already don't like the sound of this" says James.

"Your buddy, Cortez, turned me down but I figured since you're not a wuss you could indulge me?"

James leaned back on his station, "you suggesting a threesome Alenko?".

"That's exactly what I'm suggesting, well done, James."

"Not interested, if Liara was down here asking in regards to, I dunno, Traynor, then I'd do it. But no females whatsoever? I may like a good time but I'm not like you and Shepard, Alenko."

Kaidan chuckled, "You're passing up a great opportunity to stick it to your commander, you know that right?".

"Stick it to'em?"

"Yes," Kaidan began, "you'd be stickin'it to him good Vega. Shepard likes it rough. Unless you're not up to-"

"I'm in, Alenko. Just let me get ready" James agrees.

"You like the idea of making the Commander squeal?"

"I like the idea of wiping that smug look he gives me after sparring."

"Even with your cock?"

"You guys better make this worth while for me" James walks off to prepare himself.

Alenko and Vega were in the elevator going up to Shepard's quarters.

"Vega you're looking sharp, did you do what I asked?"

"Yeah yeah, I put on heaps of deodorant and that cologne you gave me, it's making me a little frisky though" James answers.

"Good, you may even be turned on by this."

"Just the idea of tearing his mouth and ass up with my dick it making me hard".

"No-homo right?" Joked Kaidan.

"It's this fucking cologne you gave Alenko".

A while later, Shepard, Alenko and Vega had consumed some alcohol and a conversation regarding John and Kaidan's scenario had been brought up.

"Never knew you swung that way Commander, what with your previous relationships and all" James commented.

"You must not know as much as you thought Vega, I've have quite a lot of experience with boys"

"Emphasis on boys Vega, Shepard hadn't been handled by a real man until I showed up" said Kaidan.

"Oh can it Alenko"

"I'm a bit jealous Commander, with all this attention you're giving Kaidan I feel a bit excluded" said Vega.

"Why would you feel excluded? You're not gay."

"I have a dick too Commander, and a mouth is a mouth at the end of the day you know?"

Kaidan laughed.

Shepard considered this and turned to Alenko, "would you mind if I?"
"Not at all," Kaidan began, "It'll be fun watching".

Vega unzipped his fly and let out a ferocious piece of meat. It was a foot long, and a thick as a beer can.

"How in the hell do you hide that?" Shepard asked.

"Lots of masturbation and really tight underwear." said Vega.

Shepard went down on him and could barley fit the head in his mouth.
Kaidan was removing Shepard's jacket and kissed the back of his neck. Mildly dry humping him as he suck a hand up with warm smooth torso beneath his tight black shirt.

Shepard went up and gasped for air, precum dripping from his lips and bursting from Vega's cock head. "This isn't turning into a threesome, Alenko".

"Do you mind, Vega?" Kaidan asked.

"Nope" Vega replied swiftly.

"That two against one Commander".

James pushed Shepard back down onto his manhood, then removing his tight white shirt. At that point his manly smell and that heavy cologne flooded Shepard's senses and clouded his mind. He went down further onto James' foot long and began breathing heavily through his nose.

Kaidan removed John's pants and kissed his lower back before the lining of his boxer briefs, Shepard let out an immature giggle from the ticklish sensation of it. James forced John back down onto his cock saying "no one told you to stop, commander".

Vega stood and removed all of his clothing from his body. He brushed his hand over his torso and pinched his nipples to work up a full erection.

Vega now stood up, letting Shepard breathe for a moment.

Precum leaked heavily from John's mouth, falling to the floor the a slow motion waterfall. His face was loose and covered in penile fluids and saliva, "this is too much, I can't do it. James, Alenko, you can do whatever you want with me but please not at the same time".

"Looks like the commander will let us do anything." Kaidan remarked.
"But it's going to be at the same time commander, we won't have much free time after this" said Vega.

Shepard grunted, "but what about what I want?"

James grunted and forced his member back into Shepard's mouth, this time pushing the entire length of it down his commander's throat and continuing to thrust it. "That wasn't part of our plan, commander" Alenko commented, " 'sides, you know damn well you want this the most".

Kaidan used biotics to force Shepard's hand to start playing with Alenko's dick. Shepard let out sighs of pain because of his lack of control and James roared in pleasure at the feeling of forcing his inhuman cock down John's throat.

Minutes went by with only one short stop for Shepard to catch his breath.

"I feel like peeing, Alenko you need to take over" said James.

"I got the exact same feeling, James, but I don't think we have to walk all the way to the bathroom to do that" Kaidan suggested.

Shepard's watery eyes widened, he tried to pull his head away but couldn't.

"Just let it out James, I'll go next".

James grunted, "Whatever man, this is crazy" he said before his cock flushed a stream of urine into John. Shepard had no choice but to swallow the strong current but Kaidan approached to have his full next.

James pulled his cock away letting a few small jets out into Shepard's face. John panted with a great husk in his throat, and then moved on to Kaidan's member willingly.

"'attaboy" Alenko remarked.

Shepard began to move back and forth between James and Kaidan's members, and removed his shirt and let out his own erection from his tight boxer briefs. He let the musk of men in the air get him into the swing of things, and now he belonged to Kaidan and James.

Kaidan pulled Shepard up with biotics and planted a harsh kiss into him, James fumbled with John's lean, firm ass and laughed in excitement, "he looks fucking tight Alenko" said James.

"I wonder if you'll be able to take two of us as once in your ass, Shepard." said Alenko.