When he left, Severus heard, how professor Sprout was lecturing the red head and demanded from McGonagall to strip the girl from her perfect’s badge with her bullying antics. He later found out, when an irate Lily came to him and told him how mean he was and that it was his fault that she had lost her perfect position, but Severus just shrugged it off and told her that he would not talk and care about her until she changed herself and attended mind healer sessions, which she never did.