It was supposed to be a surprise—a good one. You had been gone for a few days on a solo hunt, and though you were meant to stay out for the full week, you wrapped it up early, eager to get home. It was your birthday, and you couldn’t wait to spend it with Dean. You even had a surprise planned—a quiet night, just the two of you, a homemade dinner, something small but meaningful. You knew Dean wasn’t big on celebrating birthdays, but for you, he always made an exception.

The bunker was quiet when you arrived, which wasn’t unusual. Sam was out on his own case, and Dean had mentioned staying back to do some research. You slipped inside with a grin, picturing the look on his face when you showed up unannounced.

But the moment you stepped down the stairs and into the hallway, something felt off.

Voices.

Not just Dean’s voice. Someone else—female, laughing, soft, intimate. The sound of it made your stomach twist in ways you couldn’t explain. Heart racing, you moved closer to the room, trying to keep your footsteps silent, though every part of you felt like you were stumbling into something you didn’t want to know.

You stopped just outside the door to Dean’s room.

And there it was. Clear as day.

Dean was there, with her—someone you didn’t recognize, tangled up in the sheets. The laughter, the words exchanged, the sight of him with someone else—it hit you like a truck. You froze, the world crashing down around you, disbelief and shock coursing through your veins. You could feel the tears pricking at the corners of your eyes, but you fought them back, the hurt quickly turning into something far more complicated. Anger. Betrayal. Heartbreak.

You had been planning to surprise him. But this was the surprise you got instead.

Dean didn’t notice you right away, too caught up in whatever moment he was sharing with the stranger. But eventually, he looked up—and saw you. His entire expression shifted in an instant, from surprise to guilt, his mouth parting like he wanted to say something, but no words came out.