Quote Axl Rose: Perhaps Hillary could be Neil's daughter but at the same time we know little or next to nothing about Neil's past before he ever came to Genoa City, so it is possible that before Neil ever came to Genoa City, that he could have hooked up with Hillary's mom way back when way before ever meeting Dru, so it could then possible for Neil to be Hillary's father and that Hillary's mother could be someone else from Neil's past way before he ever came to Genoa City because we know hardly anything about Neil's past
But you have to admit that I do have a point here
I see that point but the child would be older than Lily by at minimum 5 years real time and Hillary seems a bit younger than Lily! Why bring Dru's death up unless Dru's the mother? Neil was trying his hardest to get Dru pregnant again just before she left for Paris, Dru had started taking birth control to avoid pregnancy and didn't want another child. Once in Paris she could of discovered she was pregnant and gave up the child. It was several years later before she found her way back to Neil and telling him they had a child out there would of destroyed what they had so she kept her secret to herself! I think Rose is Rosella who is an aunt of Carmine and since the winters are talking Carmine and Leslie his lawyer and mention of him having no family or friends in town are hint's. Rosella is a psychic and if she is Rose than my guess is she gave Neil a reading when they met regarding his daughter with the woman from the paper(Dru) only Neil assumed she met Lily not knowing Hillary existed! Rose meets Hillary years later and gets a reading from Rose which leads her to Genoa City!