Etty whistle-sounds again. She puts her neck back in a more natural position, and then, after a moment's indecision, bites a dangling lock of Nona's hair.
She giggles again and pets Etty some more. Does Etty want to be in her lap? Nona thinks that it would be lovely to have Etty in her lap.
She does! Her fluffy feathery cuddly swan-person lapful sits and tucks her head under her wing.
Nona is gone, but the clothes she was wearing remain, made into a little nest for Etty.
Etty takes off, and she flies. The nature of the curse means she can fly in a straight line till sunset, and not worry about getting lost.
Etty goes into the orchard to uncover her writing supplies again.
Etty eats fruit and processes and makes sure she has her scroll and pen and ink away before sunrise. She goes swimming with the last few hours before light; it's more fun when one doesn't float so automatically. And she wants to confirm that she doesn't have a residual fear of drowning. (She doesn't.)
If she doesn't get out of here soon, she supposes she'll have plenty of chances to test this and other hypotheses about what might help.
It seems to help Nona, anyway, or at least there's no obvious competing explanation for why she does so much of it.
Or maybe it's just what she does, like freezing and shivering is what Etty does.