It will be a great mistake, as s/he already knows.

"Let's see what s/he's got." 

"And then we will find out, don't we?"

"I know you'll whip it into shape. You always do."

"I thought you were on leave?"

"And I thought we were supposed to be going together."

"Oh I can't leave them when s/he needs me the most."

"I had a feeling you would say something like that. So I brought us ...dinner."

"Oh, you're the most understanding life form I know."