Replying...
Intro. \Sam and Madison have been childhood friends, have known each other for many years, Madison is Bobby Singer's niece, she went to live with him after her parents die at a hunt against vampires. Sam, Dean and Madison or Maddy as the brothers prefer to call, they grew together and as always Dean has always been the oldest and Sam the youngest, being practically the sister of the winchester is a difficult experience but they are a great " family (even if not all blood is heart) \Lately Sam has been different with Madison ... has he stopped seeing her as a sister and now she is something else? ...

Sam Winchester

@𝕸𝖆𝖉𝖎𝖘𝖔𝖓