Snape’s mother was mentioned briefly in Harry Potter and the Order of the Phoenix during an Occlumency lesson.  When Hermione investigates the Half-Blood Prince, she discovers that Eileen Prince married a Muggle by the name of Tobias Snape and they then had a child, Severus.  Eileen was also very good at potions, and Hermione originally believed that she was the Half-Blood Prince.

J.K. Rowling has said that Snape was loved by someone.  Was she referring to his mother or was it romantic love?  Is Snape’s mother still living?  Is Eileen Prince or Tobias Snape going to play any kind of part in Book 7?