Well, I don't know what to say.. the story was told to the tabloid "The Sun" par Michael's bodyguard Matt Fiddes. Here is the link: link
This man (Matt Fiddes) claims to be the real father of Blanket, he didn't a dit that Whitney could have be the real mother of Blanket. He a dit that MJ and Whitney had a relationship in the 90s.. and that MJ hoped to marry her. But.. he also a dit a lot of bad things, a lot of lies about MJ, toi can see it in the link above.. This dude is only seeking for attention on MJ's back. That "It would be great to be acknowledged as Blanket’s real father" says everything about this man!! Blaket's father is only Michael!!!
I'm sorry not trying to be rude but stop lire that tabloid sh*t!!! Michael was Friends with Whitney and I don't know about "affairs" of any sort (to be honest what he did was his business) but I know for a fact Whitney is not the mother of Blanket :p