I have been running a group through the Lost Mines (LMoP) and we recently had a new player join us. It was relatively easy to have her join since the group was in Phandelin, but she came up with a background that has thrown me for a loop. Since she knew about the story up till now, she decided her background involved the Black Spider. Her parents were killed 6 years ago and she was left a note that had the Black Spider symbol on it. She has never opened the note to date...
Sooooooo...that leaves me with an interesting story to tell, but how can I handle this?!
I can't come up with a good reason the Black Spider would have left a note for her after killing her parents...
Any thoughts?
She is a Forest Gnome. She was found by a cat after discovering her parents dead and the note left behind. This cat is another Druid who has been trapped in cat form. Said cat led her to a friendly Druidic circle, who took her in. She became a Druid of the Land and has had the cat as a follower since.
Sooooooo...that leaves me with an interesting story to tell, but how can I handle this?!

Any thoughts?
She is a Forest Gnome. She was found by a cat after discovering her parents dead and the note left behind. This cat is another Druid who has been trapped in cat form. Said cat led her to a friendly Druidic circle, who took her in. She became a Druid of the Land and has had the cat as a follower since.