(Sultan, WA)  --  Authorities say a man who broke into a home in Washington was shot and killed by an 80-year-old woman after he stabbed her husband.  The Snohomish County Sheriff's Office says the woman found the intruder last night at her home, standing over her 75-year-old husband with a large knife.  Deputies say she retrieved a gun from her closet and shot the intruder to death.  The woman's husband is listed in serious but stable condition.