When I was reading the story, I saw it going in the direction of "she was talking to her mom and thought I was creepy". So maybe my gut instinct isn't wrong. Maybe she knew the person in front of you more personally and thought you were being weird by adding onto a personal conversation that you had nothing to do with?

Pure speculation, obviously. Either way, no FU here.

There is no cure/treatment yet. This is allegedly for the research to create a treatment.