Evolution

my 1st Supernatural Fanfic! What if the effects of the Demon Blood showed up in Sam way earlier? AU. teen!chesters (Sam 15, Dean 19) to start, will probably move into the series later. WARNINGS: M for some violence, language. Some extreme child abuse. (I like John, think he obviously loved his sons. For this story, however, he's an abuse jerk who blames Sam for Mary's death