I am being accused by my estranged family members of selling my body (Which is not true) and need advice on how to overcome extremely poor accusations

You can't, really. Best I would suggest is just lowkey say things that suggest otherwise. Getting a boyfriend would probably help.

But fools will be fools, and there's nothing you can really do about it but try to avoid them. Like natural disasters. Or fast food.

Suffer fools gladly. Better yet, you can use them for creative material.