Between her son and herself was a quiet but undemonstrative affection.

The mother had much undemonstrative affection for her daughter, but no understanding and less sympathy.

Never in his life had he dreamt that her quiet and undemonstrative affection was capable of anything but a calm and beautiful development.

And the reserved, harassed man felt his heart go out to the girl, with her quiet shrewdness and undemonstrative affection for her brilliant sister.