Incorrect Count
I have looked everywhere (well, not that thoroughly) for a reason to support this story, but I have come up empty-handed. If I were to speculate, I’d assume that telepathy is to blame for what happened. That makes perfect sense to me why you would think so, even if it is plausible that telepathy does not exist. But is there no other viable explanation for this? She asserts that she was unaware that the buddy was staying the night at the home of a third party who they both knew.
She must have had some kind of psychic ability since she was able to figure out that her friend wasn’t at home and phone the right number to get in touch with her. Maybe the strength of their relationship was what enabled them to develop their telepathic powers. If what you’re saying is accurate, then it shouldn’t come as a surprise that this event continues to perplex her to this day. If anything like were to happen to me, I believe that my reaction would be the same as yours.