Who is Ruth Paine from Case Closed: Lee Harvey Oswald and the Assassination of JFK and what is their importance?

Ruth Paine is a thirty-one-year-old Dallas housewife who was studying Russian. She was separated from her husband Michael, a Bell Helicopter research engineer, and met the Oswalds at a dinner party. She became friends with Marina. When Lee went to New Orleans, in April 1963, Marina and June moved in with Ruth.