You may be right about the initial source.
If FP didn’t know the woman he would have said that.
“What I have read in a recently published article from an anonymous individual about me is untrue and did not happen,” Santangelo said in a text message Saturday. “This is not representative of who I am as a man or a professional. I am confident that my name and reputation will be fully cleared.”
I don't read that as acknowledging he knows who is accusing him. You can't really deny knowing an anonymous person.