I wonder are there no other clothes for her. She is wearing the same uniform since chapter...

In the first chapter this issue was addressed. Apparently the normal clothes female demons wear are too slutty for her taste. And considering that they had so much trouble with even finding food before An and Deux were born, I'm thinking tailoring its not really a priority right now. Maybe one of the future kids will be a tailor and make some new clothes for her (≧∀≦)