Don't be too surprised if Biden, or a media written question, brings this up at the debate. Trump could reply that Biden himself showered with his very young daughter, but I would expect the "moderators" to cut his mike, saying "fact checkers...."
Like the "51 national security officials" letter.
James Robison Corrects The Record About he and Robert Morris Meeting with Cindy
“I have a statement here in my hand from Cindy’s attorney attesting to the fact that I was not present at any of the meetings between Robert and the victim’s family. In fact I did not become aware of the girl’s age until the news broke last week.”
https://www.youtube.com/watch?v=pfaRuTSS—I