Answer:
The interruption was likely caused by the death of Mr. Wright which led to the arrest of Mrs. Wright, thus, the incomplete household work.
Explanation:
Susan Glaspell's play "Trifles" revolves around the murder of Mr. Wright while his wife was asleep. But the wife was wrongfully accused of that murder and kept captive for trial.
When the Sheriff came along with the county attorney and the others to observe the crime scene, they found that some things were left lying, as if they had been left abruptly. The dishes/ utensils were left unwashed under the sink, "a loaf of bread outside the bread-box, a dish-towel on the table—other signs of incompleted work." This must be because when Mr. Wright's death was discovered, Hale immediately called Harry and took the man down and thus, began the crime investigation. And since Mrs. Wright was the only one present during the "killing" of her husband, she was the first suspect to be taken which must have been why she had to abandon all things undone and be taken to the station.
Moreover, Hale also mentioned how "queer" Mrs. Wright looked when he asked her about the death, remarking that she just sat on the rocking chair and pleated her apron, with not much of an expression on her face.
