[ He watches her carefully and he's starting to get a bit of an idea of how she's like. He can agree with her way of thinking and he thinks it's admirable to keep on helping but he also knows that it's also important to rest. ]

I know. Then how about this? Let me take over for just a few minutes so you can catch your breath then afterwards, we'll work together.

[ He thinks that's a good compromise. This way, he can take the load off her shoulders just a bit. ]