Russell, who has now been left alone to raise her three-year-old daughter, was totally unaware of her husband's evil plans, her attorney Amato DeLuca told AP.
"When this allegedly was going on, she was working, and had been working all week to support her family," DeLuca said.
She had no reason to suspect anything was amiss, DeLuca insisted.
In fact, Tamerlan played Mr. Mom, taking care of the couple's daughter, Zahara, while Katherine put in her back-breaking hours.
As RadarOnline.com has been reporting, Russell, who was raised Christian in an upper class suburban family, converted to Islam after meeting and marrying Tamerlan.
She then shocked family and friends by completely changing her wardrobe to dress in full Muslim attire.
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Tamerlan was killed in a shoot-out with police on Friday.
His brother, Dzhokhar , 19, was seriously wounded and captured. He is now being questioned by authorities, has been charged and could be facing the death penalty.