I'm pretty sure but awhile ago I read a story with Jessica and she knew about hunting as her dad was a hunter and actually saved herself from the demon. After that I'm not to sure what happened I'm not sure if it stayed Sam/Jess or it went the Sam/Dean/Jess route. Any help finding this story would be appreciated I really liked it and was hoping to read it again.

Also if there is any other stories that has Jessica with prior knowledge of the hunting world I would love to read those as well...

UPDATE: I found the story I was looking for later on last night as I wasn't able to sleep and was bored however if anyone can rec similar stories I'll appreciate it...  The story is stranded all in love by earthquakedream