Vera's name is ironic, because the word Vera means truth. And in the story, Vera lies, not once, but twice. If Vera didn't lie, then the whole story would have no point. If the author hadn't purposly named her Vera (truth), then there would've been no point, because it would've been a random girl telling a lie. But the irony makes the story interesting.
Reading the story, until the last line, you believe that Vera's aunt is crazy. But this line gives the story meaningful. Romance at short notice means that she is a specialist in making up stories off the top of her head. In the beginning, the two (her and Mr. Nuttel) had nothing to talk about, so she decided to make Mr. Nuttles stay at the Sappletons' interesting by making up a random story.
This line, said by Mrs. Sappleton is very ironic. This is ironic because Mr. Nuttel came to their house to rest, and he is probably confused at this point. He has Vera telling him a story that her uncle went out in the woods and never came back. And then just now, Mrs. Sappleton says that her husband is going to come back through the window.
This line is also ironic, because if you read this line, you would probably laugh or look at the line like it's dumb, but actually that did happen. Those things really came back to life