Lourdes, 14, has revealed how her mother roots through her shoes and accessories and takes them without asking.
'I go into her closet and I'm not going to take things without asking, but she's always taking things without asking,' she told a US television show.
'She wears my shoes a lot and she wears my accessories a lot. She gets mad at me when I take things without asking her.'
Lourdes, whose father is fitness trainer Carlos Leon, is so well-versed in fashion that she has been having more and more input into Madonna's Material Girl fashion line.
The Queen of Pop began collaborating with her teenager daughter on the range of youngsters' clothing last year.
The fashion line, which has come under fire for its risqué style, was named after Madonna's 1985 hit single.