Nat watched Tony closely, the past few years with him and the other's she'd been able to get a good read off of each and everyone. So when Tony answered quickly and made the comment about penciling in, all Nat could do was take a sip of her own drink as she came to stand close beside him.
Only to watch him look to his watch and say that it was getting to that time for Jane and Thor to come through that door. A simple nod was given as another sip was taken. "I'll pencil something in." She said as she glanced to the door as it started to open.