When Pete finally breaks out of his tunnel Nona says she thought he'd be shorter. But she had already seen him a couple of times, most notably when he was being dragged inside after his excursion to the Canadian border, so she should already know.
When Dad and Little Pete are watching the fireworks Nona is in the background. When Pete says something about all Dad has is a pile of grass, Nona starts walking toward them. The scene changes to fireworks and then back to Dad and Pete. Nona again starts walking forward.