Don't Blink by the--blackdahlia (John Winchester X Reader)

Series Summary: When (Y/n) takes a simple haunting case on her own, she gets in way over her head. Being transported to the past, she falls in love with a young marine with a killer smile. The only problem is she knows his sons and his girlfriend wants to kill her, and probably knows about twenty ways to do so.

I did not write this story. I take no credit or ownership. The author is http://the--blackdahlia.tumblr.com . She has given me permission to post her series on here