if she puts any effort into her appearance chances are shes been ran through. Just the way it is. Females don't dress up to attract other females.
Best way to find out for sure is through her "Friends". Females are always in competition, you ask one of her friends they'll snitch her out quick just to try and fukk her over.
in my opinion you gotta learn to judge these females on more then their past. Look at the whole package before you make your decision. Cuz most females have a past, and most females will lie about their past to trap simps too.