Why does Mrs. Hale go to the Wright house with the sheriff and her husband?

Mrs Hale accompanied the sheriff and her husband because Mrs. Peters asked if she could come along. The two women were meant to gather things for Minnie Wright... clothes and a few personal items, to take to her in jail.

"I suppose anything Mrs. Peters does'll be all right?" the sheriff inquired. "She was to take in some clothes for her, you know--and a few little things. We left in such a hurry yesterday."