Don't fall for this trick! This young woman has clearly strangled someone with the pnties and is trying to use you to destroy the evidence. You should instead trick her into taking shelter in your home then proceed to strangle her with the panties and then burn them. Once you've done this you are now faced with a choice. Destroy the body with items such as industrial grade acid or the fire... Or keep her corpse just a while longer for whatever desire your clearly sick mind wishes to fulfill.