[It's no promise but she doesn't seem apt to pull one from him. He's doing this of his own will after all and at a cost to himself, no matter whether it seems significant or not for him. And she is grateful to some extent; she has no more desire to constantly see the little 'fruits' on the tree than he does.
no subject
She straightens from her bow and nods then.]
I understand. I am still grateful however.