Severus Snape was a close friend of Lily Potter.
 The sessions are made difficult by their mutual hostility and end prematurely when Harry uses Dumbledore's Pensieve to view one of Snape's worst childhood memories without the latter's permission
 But when Scorpius shows that he knows of Snape having been in love with Lily, Harry's mother  Snape's most closely guarded secret  Snape becomes convinced that he does indeed come from a different timeline where Harry and his friends won

