They are at the dinner table when Cas starts giggling. Dean, who is chewing an oversized bite of pizza raises a curious eyebrow to see if he’s missed something, but Sam looks just as confused.
Dean swallows. “What, we have something on our faces? What’s up with you?”
Cas smiles, glancing down at his hands looking as if a laugh is about to burst out if he opens his mouth even a little. He shrugs, feigning nonchalance, but his lips are pursed tightly, his eyes crinkled at the sides. It’s a moment before he says “nothing,” with a tiny snort.
Sam shoots Cas a strange look, which Dean knows he shares, but when Cas forces himself to calm down, they all shrug it off.
“Ok, Elmo,” Dean says, his voice thick with sarcasm.
He takes another bite of his pizza and is met with another soft giggle from Cas’s chair.
Looking at his own food, then Sam’s, he’s starting to be suspicious, but he doesn’t see anything, so with a sip of his beer, he takes another bite.
Cas is leaning over, clutching his stomach with one hand, the edge of the table with the other, practically in stitches with laughter.
Dean drops the rest of his slice of pizza back on his plate.
“Ok,” he says sharply, “spit it out. What the hell is going on with you, Cas?”
Cas lifts his head, smiling, then wipes a stray tear from his right eye. He raises a finger pointing back and forth between Sam and Dean’s pizzas.
“I pranked you,” he says, in-between fits of laughter. “Now I know why you and Sam enjoy this. It’s thoroughly entertaining to engage in trickery,” he says with a nod.
Dean scowls, his voice growing darker. “Cas. Sweetheart,” he says, very slowly. “What do you mean you pranked us. Did you do something to our food?”
Cas laughs again.
“Babe…” Dean says with a stiff jaw.
Making himself smaller with a guilty smile, Cas nods.
Dean glances at Sam who is staring at his pizza with a wary look.
He turns back to Cas and whispers sharply: “x-lax?”
Cas shakes his head, “no,” snorting.
“You’re never going to guess.”
Folding his arms, Dean looks at his boyfriend like a child. “Guess you better tell us then,” he says warily.
Cas smiles brightly, practically jumping out of his chair.
“I put pineapple in your pizza!” he says. “You told me that putting pineapple on a pizza was a terrible idea and I tricked you into eating it by cutting up the pieces really small and hiding them on your pizza. You both ate it!”
Dean purses his lips, biting back a smile as he glances at Sam who looks equally as entertained.
“I really tricked you two,” Cas says proudly, nodding again.
Dean leans toward his boyfriend, motioning for him to come closer.
Cas scoots his chair nearer to Dean apprehensively. His giggles fade as he takes on a more apologetic face, blue eyes perfectly capturing the “puppy dog” look.
“You mad?” Cas asks quietly.
Leaning forward, Dean tugs Cas’s chin toward him and plants a chaste kiss on his lips. He pulls away with a fond smile.
“You got us good, babe,” he says with a wink, and he can hear Sam chuckle in the background.