Kurt knocked twice on Blaine's front door, whistling cheerily to himself as he waited for an answer.

"Oh, hello, Kurt. Come on in. Blaine and Cooper are upstairs in Blaine's room playing video games if you want to go join them."

"Thanks, Mrs. Anderson.", Kurt replied, heading up the stairs with a slight roll of his eyes. Of course they were playing video games. What else did those boys ever do?

Kurt opened the door to Blaine's bedroom.

"Hey, guys! What are y-"

Kurt was cut off by an exceptionally loud moan from Blaine, and that's when he realized, they weren't playing video games at all.

"Oh....I'll just..." Kurt had planned to leave, but his feet were glued to the floor.

"You can stay, Kurt." Blaine panted from underneath his brother.

"Yeah. Please, Kurt. You know Blaine and I love performing." Cooper winked.

Blaine let out a laugh, which turned into a moan as Cooper thrust sharply, hitting his prostate.

Kurt knew he should be disgusted. Or jealous. Or both. After all, his boyfriend was having sex with someone else. And not just anyone else. His boyfriend was having sex with his own brother. That was wrong on so many levels. And yet Kurt simply couldn't get over how hot it was. They were both incredibly attractive. He couldn't take his eyes away.

"Yeah. Okay, yeah. I'll stay." Kurt said, turning and quickly picking up a chair, and setting it where he would have the best view of the bed.

"Oh, fuck, Coop. Faster."

Cooper sped up his thrusts just slightly, grabbing onto Blaine's hips, and moaning wantonly.

Kurt had to wonder how many times they had done this. They seemed rather practiced....

"God, Blaine. You're so tight."

Kurt had to bite his lip to hold back a moan. Because he knew just what Cooper was feeling. Knew how tight Blaine was. Knew how Blaine felt around his cock. And God, he wanted it. Right now.

Blaine dragged his fingernails down Cooper's back, leaving red marks all the way down. Kurt saw Blaine hesitate a little before raising his hand up, and smacking Cooper hard on his left ass cheek. He looked over at Kurt and winked devilishly.

Kurt scoffed, rolling his eyes. His boyfriend was quite the showman.

"Again." Cooper ground out, thrusting harder into Blaine.

Blaine raised his hand again, and brought it down with even more force than before. Cooper yelped, throwing his head back in ecstasy.

Blaine took his hand away then, licking his palm, and wrapping it around his cock. He began pumping quickly, groaning with each flick of his wrist.

"Fuck, Coop, I'm gonna come so hard."

"Not yet, Blaine. Kurt just got here." Cooper said, grabbing Blaine's wrist and yanking his hand away from his leaking cock.

"God, Coop, just....Fuck."

Kurt laughed a little at this. He loved how incoherent Blaine got when he was right on the edge of his orgasm.

Cooper leaned down, taking Blaine's lips with his in a fierce kiss. And, God, why was that so hot? That shouldn't be hot. But there was no denying it.

Blaine sucked Cooper's bottom lip into his mouth, and Cooper moaned, his hips stuttering just slightly.

Kurt was starting to have trouble focusing on anything other than his far too hard dick in his far too tight jeans, but he made himself watch.

Cooper pulled his mouth away from Blaine's, causing Blaine to whimper at the loss.

"Fuck." Kurt whispered to himself. He reached down, and undid his jeans, slipping them off, and relieving some of the pressure from his throbbing erection.

"Looks like we've done our job, eh, Blainey?" Cooper winked.

Blaine looked over at Kurt, a smug grin on his face.

"I'd say so. Can I just fucking come now?"

"Sure, go ahead."

Blaine ran his thumb over the head of his cock, collecting the precome there, and spreading it down the length of his cock. Cooper angled himself so he was slamming hard into Blaine's prostate with each thrust.

"Shit. Oh, fuck. I'm so close." Blaine sped up his hand on his dick, and one, two, three strokes later he was coming. All over his hand and chest.

Cooper felt Blaine clench around him, and then he was coming too, tossing his head back with a shout. He pulled out of Blaine slowly, removing the condom, and throwing it away. Blaine reached for a tissue to wipe himself off.

"Wait!" Kurt shouted from his seat in the chair. He stood up, and walked over to the bed. "Let me....Let me lick it off?" he breathed.

"Of course." Blaine said, nodding enthusiastically.

"Can I watch?"

"Sure, Cooper, whatever you want." Kurt said, before grabbing Blaine by the wrist, and licking up the palm of his hand. He took his time, sucking each digit clean with precision. He then leaned down, and licked Blaine's chest clean, sucking on a spot right by his collar bone. He pulled away, then, and looked up at Blaine with lust filled eyes.

"God, Kurt. You're so hard." Blaine said, feeling Kurt's erection digging into his thigh. He stood up, and kissed Kurt hard. When he pulled away, Kurt was panting. He pulled down Kurt's underwear, and knelt down in front of him. "Let me take care of that for you." he breathed. Kurt shivered as the warm air from Blaine's mouth hit the tip of his leaking cock.

"Okay, I want a part of this." Cooper said, walking over, and kissing Kurt hard on the lips before he could protest. Not that he would have.

Blaine sunk his mouth around Kurt's cock, and lowered his head slowly, taking Kurt all the way in. Kurt moaned into Cooper's mouth, and Cooper took that opportunity to shove his tongue inside, tickling the roof of Kurt's mouth. Blaine hummed around Kurt's cock, and he was already so close. Watching them had just....done things to him. He pulled away from the kiss for a moment.

"Fuck, Blaine. I'm so close. Just....Please." Kurt whined.

Cooper attached his lips to Kurt's neck, and began to suck.

"Oh, God, Cooper, don't stop." Kurt panted, hips bucking forward into Blaine's mouth.

Blaine ran his tongue up the vein on the underside of Kurt's dick, licking the head, and then sinking all the way back down. And then Kurt was coming, long and hard, down Blaine's throat. He moaned at the taste, swallowing it all. He pulled off with a faint pop, and stood up. Kurt bent down to pull his underwear back on, and when he stood back up, Blaine and Cooper were kissing. He stood there, mouth agape, watching them. When they pulled apart, Cooper looked over, taking in Kurt's shocked expression.

"Sorry, Kurt. I just really wanted to know what you taste like, and Blaine had a sample." Cooper said, winking. "For the record, it was good. Maybe someday I could have more than just a sample." And with that, he put his pants on, and walked out of the room as if nothing had happened.

Yeah. Kurt got the feeling they did this a lot.