A lovely poem and well deserving of that prize, Margaret.
I particularly like the horizontal format of this work which makes the reading so much more ambiguous,and creates for me a sense of "not quite grasping" the sentence, or of my interpretations fading and shifting and blowing between readings – so capturing in a verse the visual effect most of us know of how skywritten words disappear. Brilliant.
My own past efforts at single line ku have been rather mediocre, but I'll make another attempt inspired by your poem, Margaret:
Second Place, 17th International Kusamakura Haiku Competition
A fine internal comparison, while watching a plane create words actual or imaginary words. The fading contrails echo either the lack of conversation, and communication, between the couple over the years as they drift apart, or that perhaps they know each other so well, they can enjoy each other's company without the need to constantly break into words.