The eldest sister who is married always goes back to her parents' house to get things done
The eldest sister is a "mother's thief"
"My brother and sister are off work? I have something to do at home. I'll go back first, and come back another day." As soon as I entered the door, the eldest sister hurried away with a big bag and a small bag. If you don't look at it, you will know that she has come to the house to search for things again, because she is a veritable "mother's thief".