Dean cannonballs immediately.

Sam sighs. “Of course he does.”

Jack hesitates at the edge of a slide. “What if I lose control?”

Castiel kneels beside him. “Then I will be here.”

Jack nods and goes—splashing into shrieks of laughter.

Dean whoops. “THAT’S MY KID!”

Castiel stands ankle-deep in the pool, trench coat abandoned, rolled sleeves wet. For once, he laughs. It’s quiet. Surprised. Real.

Sam watches the three of them, chest aching in a good way.

For one day, they are just a family on vacation.