Christine Fitzgibbon, 60, was given a two-year sentence at a hearing in Crown Court in Manchester, The Liverpool Echo reported. Her son, Jason, 40, got 16 years and his younger brother, Ian, 39, 14 years and six months.
The brothers were arrested in 2011 when police foiled a plan to import a large quantity of heroin from Turkey. Investigators said the drugs had a street value of 7 million pounds ($11 million).
"The drug dealing involved huge quantities of both heroin and ecstasy," Paul Mitchell, the prosecuting lawyer said. "It involved the importation of multi-kilogram quantities of the drugs into this country and then the onward supply of those drugs. The scope of the enterprise was truly breathtaking."
Mitchell said investigators seized large amounts of cash, some of it found in Christine Fitzgibbon's home, and described her as the family "banker." The Department of Work and Pensions said she was collecting benefits while enjoying a large income from her sons' business.
Investigative reports released to the Echo Friday showed the brothers' squabbling about who was the most effective in the drug business.
2014: The Year in Music [PHOTOS]