Sleeping in a treehouse that was purposely built without walls?
Sounds like someone has flunked her IQ test.
When I was little, one of my neighbors had a tree "platform." No walls, suspended by cable at four corners, and about 20' x 25', with the tree trunk rising through a large opening in the center. It was really nice . . . and it would sway in the breeze on windy days.
We spent hours up there.
It was a flet. (LOTR reference).
Unfortunately, Joan isn’t an elf.
Sleeping in a treehouse that was purposely built without walls?