Wash beams. He gets to show off his baby again! Yay!

Hopping to his feet, he beckons for Crowley to follow as he crosses the room. Unlike when most patrons open the front door, when Wash tugs on it, this one splits roughly down the middle and slides back into either side of the wall, revealing the metal steps leading down to Serenity's front hall. The lights around Kaylee's door cast a faint, comforting glow; the kitchen's just visible in the distance.

He moves a few steps down the stairs so Crowley can come aboard.