The day started as it normally did for Castiel. He got out of bed, sent Dean a text and got dressed in his usual attire before he went into the library to look for Sam. As always the young hunter was already there, hunched over his laptop and a note book, researching for another hunt.
The angel slowly walked over to him after a short greeting and leaned over his shoulder to look at the screen and Sams notes.
While he stood there he became wierdly aware of Sam. He could feel the warmth radiating from his body and he could smell his new cologne. The angel noticed these things quite often these last few days. He also became aware of how tall Sam was, how toned his chest must be and how strong the hunter had to be.
As Castiels thoughts drifted off he continued to look at Sam. He didn't even notice it when Sam looked up from the Laptop and into Castiels eyes. The angel only realized it when Sam spoke to him, "Castiel? You're staring." The hunters voice sounded slightly deeper than normal and a bit raspy which made Castiels mouth go a little dry.
For long seconds nobody spoke, they just looked at each other with silent hunger in their eyes. Not even a minute passed before Castiel made a decision and surged forward to press their lips together in a desperate kiss. The hunter immediately kissed back and ran his hands through Castiels short hair.
While they kissed Sam slowly stood up from the chair and pressed the angel against the table. Castiel moaned when he felt Sams growing erection pressing against his own and the hunter seized the opportunity to slip his tongue inside Castiels mouth.
The angel ran his hands over Sams chest and up to his neck where he let them stay while the hunter had one hand still in Castiels hair and one hand on his hip to pull him even closer.
They parted for breath a little while later but before they could resume their previous activities Castiel said, "We need to stop. I am in a relationship with your brother, I-" but he couldn't finish his sentence because Sam pressed their lips together again before saying, "It's okay he isn't here and he wont be for the next day or two."
Castiel looked a little unconvinced but nodded before kissing Sam again. While they kissed the hunter started grinding their hips together which prompted little moans from the angel. Sam smiled into the kiss and started removing Castiels trenchcoat which the angel happily let him do.
One of Sams hands moved towards Castiels crotch where he unzipped the angels fly and started stroking him through his boxers. The hunter simultaniously started opening the buttons of his own shirt before he slid it off his shoulders and onto the floor.
The moment Sams chest was exposed the angel started roaming his hands over it, touching every part of Sam he could reach. Sam in return deepened the kiss and started full on stroking Castiel.
The angel moaned loudly and threw his head back while gripping the table behind him to steady himself. Sam used this opportunity to kiss along Castiels neck, sucking and nibbling at exposed skin until purple marks where visible.
The hunters free hand then started unbuttoning Castiels shirt to make even more skin available to him. After he opened the shirt he started kissing and licking his way down until he knelt in front of the angel. Slowly he pulled Castiels pants and boxers down, exposing the angels erection.
Sam smirked at the sight and started licking the tip of Castiels dick while fondling the angels balls at the same time. The celestial being moaned loudly and with one hand gripped the table tighter while his other hand found its way towards Sams hair. He gripped the hunters hair tightly and pushed him towards his dick which elicited a surprised noise from the hunter.
Sam took the angels cock into his mouth after that. He could feel the weight of Castiels throbbing erection on his tongue and moaned at the taste of the angels precome. Slowly Sam took more and more of Castiels erection in his mouth until his face was pressed against the beings pubic bone. The angel moaned at the sensation and jerked his hips.
Sam choked a little before he swallowed around Castiels cock and started bobbing his head up and down slowly. The angel gasped in return and his hand clenched in Sams hair while his hips continued to jerk upwards. The hunter groaned around the angel and started moving faster and taking the angel even deeper.
After a few seconds of this the angel groaned loudly before he came down Sams throat. The hunter swallowed every last drop of Castiels cum before he licked the angel clean. With every touch of Sams tongue on the angels sensitive dick he keened and moaned. The hunter licked and kissed his cock until no drop of come was left.
The angel panted and watched Sam stand up slowly after the deed was done. The celestial being wanted to say something but before he could utter a single word the hunters lips were back on his own. The angel could taste himself on Sams tongue which made him shudder in arousal.
Their tongues danced while Castiel burried his hands once again in the hunters now dishevelled hair. Sam in return pressed his still clothed and hard cock against Castiels which was half hard again.
Sam broke their kiss after a little while and turned Castiel over, pushing him onto the table. As Castiel realized what was about to happen he turned his head towards the hunter and said "Sam wait. We really shouldn't do this." Sam pressed his erection against Castiels exposed ass and leaned down until his mouth was mere inches away from Castiels ear before he answered "We already went this far, little one, this wont make that big of a difference."
Sam then started moving a finger up and down Castiels hole, smirking when he felt the angel shiver. He pulled a little bottle of lube out of his back pocket and squirted a good amount of it on his finger before slowly pushing it inside the angels tight hole.
Castiel jerked his hips and pressed his forehead against the table as Sam began moving his finger in and out of the angels hole. He added another finger after he heard the angels needy moans. Sam changed the angle of his fingers until he heard a surprised yelp coming from the celestial being.
Smirking, the hunter started repeatedly pressing his fingers against the angels prostate. Castiel was so lost in the pleasure that he didn't even notice when Sam slipped in a third finger. The hunter continued his movements a few more times before he pulled his fingers out of the angel which prompted a whine from him.
Sam chuckled and unbuckled his belt before pulling down his boxers and pants. He slicked up his now free and rock hard cock and pressed it against Castiels puckering hole.
"We really shouldn't do this Sam." Said the angel with a tremble in his voice but the Hunter in question didn't react. Slowly Sam pressed his aching dick inside the angel, groaning at the tight heat surrounding him. He moved forward until his whole length was inside Castiel and groaned.
He leaned down and lowly said "If you really wanted me to stop you would've already thrown me off." Castiel made an affirming noise and sighed.
The young man started nibbling at Castiels neck again, waiting until the celestial being was ready for him to move. Little time went by until he heard the angel say, "Sam, please move.", with desperation in his voice. The hunter smirked and began to move his hips slowly at first. After a few shallow thrusts the angel started to moan and writhe beneath him which was only reinforced as the hunter started stroking Castiels cock in time with his thrusts.
With each moan coming from the angel, Sam started to move his hips and his hand harder until the angel was a sobbing, moaning mess beneath him.
Sam grabbed the angels face and turned it towards his own before pressing his lips against Castiels once more to swallow the desperate sounds the being made beneath him.
The hunter felt Castiel clenching around him and started fastening his strokes and his thrusts to get the angel over the edge. Shortly after that the being shouted the hunters name and came hard. Castiel slumped onto the table after his orgasm hit while Sam continued to move in and out of the angel to chase after his own release.
After a few erratic thrusts the hunter pressed his hips tightly against Castiel and came deep inside the angels quivering hole. Sam slumped down onto the angel and kissed Castiels neck a little more while carding his hand through the angels hair. While he did that he praised and complimented the angel multiple times. Several seconds went by like that before he pulled his now flaccid dick out of Castiel.
Both men trembled slightly and were sweaty when they heard the bunker door open and footsteps coming down the stairs. They looked at each other shocked and a bit afraid before they started picking up their clothes and running towards the showers.
"I told you we shouldn't do it Sam. What if-", Castiel was again cut off by Sams mouth on his before the hunter replied, "Shush, if you keep quiet and don't tell him he wont know." The hunter smiled reassuringly and started to shower while the angel stayed in place for a little while longer looking slightly perplexed but intrigued.
It took a few seconds for Castiel to gather his thoughts before he knew what he wanted to do. With new confidence he walked up to the hunter and pressed his lips against Sams once more. Sam was the one to be surprised this time but he still kissed back enthusiastically after only a second.
When they broke the kiss both men smiled a little before Castiel said "We just need to keep this a secret then, yes?" Sam nodded and replied with a breathy, "Yeah." , before he cradled Castiels face with his hands. He then gently kissed the angel again.
Half an hour later both men had showered and dressed themselves before concealing the marks on Castiels neck with the make up Charlie forgot the last time she was staying at the bunker.
Slowly they walked towards the library talking quietly to each other while hoping that Dean didn't see or hear anything.
When they finally arrived in the library they saw Dean sitting at the table, looking at Sams laptop. Castiel feared that Dean might know what happened but that fear was diminished the moment the older hunter looked at him with a spark in his eyes.
"There you are. I thought you already left for the new hunt." While Dean said this he got up from the chair and walked towards Castiel before kissing him sweetly. They kissed for a few seconds before the angel broke the kiss and said "We wanted to wait for you. This hunt seems to be quite dangerous." Sam nodded at that and asked Dean how the hunt he was on with Garth went for them.
With that, the conversation flowed naturally and the only indications of what happened were the hidden marks on Castiels neck and the brief looks the angel and the younger hunter threw at each other.