I hope you're right JR, the fact that Grissom was so talkative and so relaxed .. in that loud shirt, lounged across the bed - when he's usually so stiff and inhibited is a bit out of character for him. Could be a fantasy sequence from Sarah .. this could also be the 'something' that Sarah was protecting in her pocket (from the picture)
Keep the secret in your pocket?? too literal?? I don't know. I think I'm just grasping at straws because I don't want Grissom and Sarah together.