What is the ruling on wearing wide trousers with a long blouse that covers the knees in front of mahrams or women at home, with the intention of adornment for the husband, and if there are adult daughters in the house?

There is no objection to a woman wearing loose, modest trousers — that do not resemble the attire of immoral women or men — in front of her husband, her maharim (unmarriageable kin), and other women, especially if she wears over them a blouse that reaches her knees.