It's finally Valentine's Day!
And the tension in the bullpen is so high that you could cut it with a knife!
Abby has showed up and is skulking around in a fully black Gothic outfit. She has ignored all wishes of "Happy Valentine's Day" and has not handed out a single homemade valentine to anyone. Tim and Tony look like they barely know how to take her, but Ziva seems to be floating on cloud nine in some secret world of her own.
Here comes Gibbs, and Abby is starting for the elevator, pointedly ignoring him. He's stopped her and is handing her a Caf-Pow! which she takes reluctantly. Does it look like he wrote something on the lid?
...
Happy Valentine's Day, Abby.
Be good.
I'll always love you, no matter what.
Gibbs
...
Abby is still stalking off into the elevator but she did take the Caf-Pow! I guess that caffeine addiction is stronger than her disgruntlement over not being allowed to celebrate the way that she likes.