Yeah all that might be what happened at a stretch, it’s not impossible. Or she could simply be the cousin of the pope, which is a perfectly ordinary and everyday thing to happen in this world. Given the number of JWs (around 1 in 400 in Christian countries) it’s reasonably likely that one or other pope has had a JW relative. Why not this one? Why are you so determined that it could not possibly be true? It’s not like she was claiming something incredible or supernatural, like her cat turned into a dog, or her wine turned into blood.
As far as I can remember Austrians were expecting that Cardinal Schönborn might become pope and were a bit disappointed he was apparently disqualified because of scandals. I only heard about Ratzinger, after he was elected, from commentators who said it was a shock that such a traditionalist was elected. Some treated it as the worst possible outcome given his history. I remember journalist Christina Odone was visibly shaken at the result and they had good fun with Ratzinger (“eyes of a killer”) on the comedy programme Have I Got News For You.
All of which is completely beside the point, it’s really getting into the weeds and has next to nothing to do with the veracity of the story. I suspect you argue just for the sake of it and AI of course has limitless energy and resources to spew out plausible sounding but patently ridiculous and tangential arguments.