Well there are articles on line that claim Davis was his father and there are nude pictures taken of her by Frank Marshall Davis. Rightpundits had the pictures.
No one knows who took the pictures. No one knows where they were taken. No one knows how they came into the possession of someone - and ended up on a ‘vintage’ porn site.
I can make another assumption. Perhaps they belonged to Malcolm X and after his assassination, they fell into the wrong hands?