Which theme is reflected in this excerpt from "A Jury of Her Peers" by Susan Glaspell?

Which theme is reflected in this excerpt from "A Jury of Her Peers" by Susan Glaspell?

And then again the eyes of the two women met—this time clung together in a look of dawning comprehension, of growing horror. Mrs. Peters looked from the dead bird to the broken door of the cage. Again their eyes met. And just then there was a sound at the outside door.
Mrs. Hale slipped the box under the quilt pieces in the basket, and sank into the chair before it. Mrs. Peters stood holding to the table. The county attorney and the sheriff came in from outside.

"Well, ladies," said the county attorney, as one turning from serious things to little pleasantries, "have you decided whether she was going to quilt it or knot it?"

"We think," began the sheriff's wife in a flurried voice, "that she was going to—knot it."

He was too preoccupied to notice the change that came in her voice on that last.

"Well, that's very interesting, I'm sure," he said tolerantly. He caught sight of the bird-cage. "Has the bird flown?"

"We think the cat got it," said Mrs. Hale in a voice curiously even.