It started out innocently enough. Spencer Reid and you had this ongoing workplace competition for weeks - little things, like who could solve a puzzle the fastest, who could name the most obscure historical fact, or who could come up with the most accurate criminal profile during team discussions. It was all in good fun, until tonight.

Spencer was over at your apartment after a particularly challenging case, and somehow the competition continued. You had both decided to unwind with a trivia game, but as the night wore on, the teasing ramped up. He’d cracked a joke about how your last guess was "elementary," and you'd countered with something about his tendency to overanalyze the simplest things. It was the usual back and forth, but maybe it was the exhaustion from the case or the tension in the air, because things escalated quickly.

You laughed and playfully swatted at him with a pillow, fully expecting him to brush it off. But instead, Spencer grabbed a pillow of his own, raising an eyebrow in challenge.

“Oh, is that how we’re doing this?” he asked, his lips curling into a mischievous smile you didn't see often.

Before you could respond, the pillow connected with your side, a light but deliberate hit. You gasped, laughing in surprise.

“Oh, you’re gonna regret that, genius!”

And that was all it took.

What began as a lighthearted, gentle exchange of pillow swings quickly turned into a full-blown battle. Spencer was surprisingly agile, dodging your swings with quick reflexes, his eyes twinkling with amusement. You managed to land a good hit on his shoulder, and he stumbled back with an exaggerated groan.

“Okay, okay, truce!” he called out, but the grin on his face said otherwise.