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Cas had been acting funny all morning. The magic in their hair turning a pukey shade of green and their painted nails tapping incessantly on the cherry wood table of the coffee shop they frequent. Dean’s no Seer but he’s also not blind.
His partner is guilty as fuck.
Luckily for Dean, he’s been with Cas long enough to know that the key to getting them to spill is to act like absolutely nothing out of the ordinary is happening.
So that’s what he’s doing. “What do you want to do today?” Dean sips his coffee knowingly. Although he’s only an immortal—no magic to speak of—he’s gained a knack for reading people over the years. Cas is no exception, although their years together seem brief compared to the number of years they’ve lived. All that’s to say, Cas is about to crack and Dean is waiting on pins and needles to learn just what has his warlock’s undies in a bunch.
Cas hums noncommittally, their low rumble practically vibrating the table as they stir a cube of sugar into their tea. The lack of eye contact is almost as telling as the way their magic twitches at the nonanswer. Dean switches the subject. “I heard Jo and Charlie finally landed on a date. They avoided the full moon so, no issues there….”
“Huh.” Cas responds, distracted and stirring their tea with such force you’d think it insulted them personally. Dean’s about to come out and just ask them what’s up when Cas speaks nonchalantly. “Apparently, vampires don’t bleed when you behead them.”
Well that’s not a typical topic of conversation, still Dean tries to act like his partner often discusses the death logistics of other creatures. “How’d you figure that out?”
Cas doesn’t answer, gaze remaining ever locked to their tea.
“Cas?” This is weird even for Cas—Dean’s used to prolonged staring but not into a cup of tea. He racks his brain, not sure why Cas won’t just look at him.
Then it hits him.
Benny.
“Cas—why do you know that?” Dean raises his voice only slightly, realization flooding every inch of him. Eyes rolling as he realizes this is why his partner has been so quiet all morning. Cas hates Benny. Always has. Dean’s first attempt at mating for life went less than stellar. Yeah, Benny was easy on the eyes and kind and funny, but Andrea thought so too.
The night he left broke Dean’s heart. And when Dean found out Andrea and him had been sharing the vampire? Well, let’s just say more than Dean’s heart got broken.
It was only a few months later that Dean met Cas and realized maybe it wasn’t his heart that broke because it was meant for Cas all along.
Cas on the other hand, never really got over it. Even ten years later they’ve held a mighty grudge. Andrea left Benny ages ago when she realized “once a cheater always a cheater” isn’t just a fun saying. Benny’s been living as a bar fly ever since, as far as Dean knows. There’s been a few instances where Benny’s tried to rile Cas up and it wouldn’t surprise Dean in the slightest if last night was the breaking point.
Cas isn’t the most forgiving Warlock, some might say they’re downright evil, but Dean’s not one to judge what someone does when they’ve got an unlimited number of years on this planet. He’s surely no saint himself.
He decides straightforward is probably best—grabbing his partner’s hand and attempting to keep the amusement out of his question. “Cas, did you kill Benny?”
His partner looks up, a proud smile playing at their lips and a small glint in their eye.
Fucking asshole.
And Dean loves it.