FrenchFire's public pics are almost certainly not her. They are however well used pics on various escort sites over the years - eg on the Girls from Paradise blog 5 years ago:
External Link/Members OnlyHowever, this comes up from reverse image searches on the "sister's" pics:
External Link/Members Only. An ad from mid-Dec that appears to show both girls with faces slightly blurred.
Step sister she says. Make of it what you will, but don't expect the lady in FF's public snaps.