Watertight WS?? but where did the information in her WS come from?? SC on the bed maybe AE?
Stealing a apple I would not worry about that, but going to bed with a mass killer including two children?? Very few women would do that would they??
Yes there was a lot of information Julie could have only got from Bamber.
Both the police & relatives are ruled out in giving her this info -
The police would not give her info & then tell her to bring up MM.
The relatives would not give her info (if they had any), as she was Bamber's girlfriend.