Tonks was running late. Surprise, surprise. She had meant to be on time to work, but there was a slight problem. That problem being falling down the last few stairs and having to attempt to fix the table she broke (lost cause) and wrap up her ankle (easier said than done) before she left to start cleaning.
Right as Teddy was banging on the door, Tonks was opening it to run out to work. Her eyes widened at the sight of her son and stared for a moment. "Teddy! What are.. hi. Hi. How are you?"