Obviously. You're overworked.

Jenny is a wonderful girl, and you love her to bits, but you're clearly too busy to afford the distraction. You focus on your work while she walks to the teapot and serves herself a cup.

That particular file is a damn mess. Why can't people do their job properly? They're getting paid for it, aren't they? And why can't they use a coherent font style? The person responsible for this hasn't noticeably improved your evening...

She looks at you with a hopeful stare, but you don't even notice. After a few minutes, she downs her cup, cleans it, and goes to her room.