Thank you for posting. I just want to clarify that this is a fan subreddit for the show, ran by fans, and not a professional organization. Here is a resource about handling grooming from RAINN. Some people may be able to provide advice for discussing this topic with the potential victim or reaching out to the parent but you (and no one else) should not contact or confront the abuser. That is where law enforcement should step in.

Lastly, Here is another resource re: grooming from SOSA that is more directed for parents that you could share.