Sour Candy 2
Supernatural, Sastiel, Warnings-None
Find me at AO3

Sam’s face shone with glee after Cas accepted his invitation, he immediately placed his hands on the seraph’s shoulders and leaned slowly over Cas ready to kiss him but stopped midway.
-Uhm, Cas? Now’s when you close your eyes.
-Oh, sorry.
Cas obediently followed Sam’s instructions and stood still waiting for Sam’s lips but after a moment of silence and nothing happening he opened them again.
-Sam?
-You know what? Maybe it’s not such a great idea after all.
Their parted lips joined neatly while Castiel invaded Sam’s mouth with his tongue, forcing a drowned moan from the hunter. He slowly expanded his grace unto Sam’s body, searching for his soul. Despite knowing on a basic level what he was supposed to do, his consciousness was assaulted by the way Sam’s soul felt from within his vessel. Bright and powerful, Sam was life incarnated. That moment Cas finally understood what humans meant when they said ‘God is in me’.
It was odd for Cas to see his friend wavering like that, he didn’t understand what was the problem but he didn’t feel like Sam actually wanted to leave the matter aside, more like he was shying away from it. In an impulse, he went to hold Sam’s neck and pulled him the rest of the way.
If Sam could only understand how pure he really was, they would have been able to withstand many trials in a very different way. After touching Sam’s soul with his grace, Cas separated himself from the hunter leaving just a short space between them and a little bit shocked about the fact that even he had to inhale deeply in order to stop the dizziness.
An awkward moment came when none of them moved away. Sam was surprised that his hands had moved over Cas to hold his head and keep him close and tried several times to start a coherent sentence just to say he was sorry for intruding in his friend’s personal space before giving up and just shutting up.
-I placed a bit of my grace in you, just as you wanted.
-Right. Uh… So, what now?
-I believe we should just wait a month or so before retrieving it, like with your brother.
-Ok, ok… cool. A month is good.
-Are you alright?
-What? Yeah, yeah dude. I am.
-Your face is red. Did I upset you in any way?
Sam laughed nervously
-No Cas, you didn’t I… I just didn’t expect you to act so suddenly.
They resumed their strolling towards the town. Sam’s head was still racing at what just had happened. When the memory of Cas nailing Meg against a wall to kiss her came vividly out of thin air he realized he should have expected for Cas to be a good kisser. Still, he just never thought Cas would take command of the situation so easily. And he had liked it.
It was not like he was shocked to have liked it, he knew himself as bisexual since the days at Stanford, and although it was true his more important relationships had been with women he also felt attracted to men sometimes. That had been the true reason behind asking Castiel for a kiss, to tick it off the bucket list of things to do before he died… again.
And it was not like he was infatuated with Cas, I mean, he used to be, years ago. But so many things had happened that there was no time for him to catch up with his feelings towards Cas so in the end Cas had become just a friend. And yeah, he would take a bullet for him anyday but so would Dean and that didn’t mean he was suddenly pining for his friend. Specially not after finding out how good of a kisser he actually was.
-Sam?
-Yeah?
-You’re not listening to me.
-S—sure, what? No I… I’m listening… Now.
Cas looked Sam in an accusatory manner but didn’t say a thing about it.
-I said you must really like acting like a guinea pig for asking to get my grace inside of you.
Sam smirked
-I thought you liked guinea pigs.
-You’re not a guinea pig Sam. You’re my friend.
Yeah, that was the problem right there, wasn’t it? Sam had opened his own Pandora’s box when he proposed the deal to Cas and now was starting to regret it.
-But if you were one, you would be a very soft guinea pig.
Sam just let out that dorky smile he always gave Cas when he said something specially nice and funny.
-Well you can pet me if you want. I promise I won’t bite.
He had just said it as a jest so he was a bit surprised when he felt the other man’s hand on his head, softly caressing his hair. It was such a gentle touch that Sam couldn’t but lean over for it while it lasted. Both men had awkward soft smiles on their faces by the time they arrived to town.