You must communicate with her in a way that she can understand you! You
must change your tone of voice and use a more loving and caring approach
rather than warning and threatening.
If you live in a kafir country, you options are limited to advice and
reminding her of Allah! Tell her that all girls can party and flirt with
men but only those whom Allah loves would be guided to be chaste and to
wear the hijab and live by it.