Lorraine Bleckley, 78, of Medford, N.J., was arrested with Kenneth Bleckley Jr., 24, and Cynthia Bleckley, 21, WCAU-TV in Philadelphia reported. She faces one count of maintaining a nuisance.
The younger Bleckleys are charged with conspiracy to commit burglary. Kristina McLeod and Jeffery Simpkins, both 23, are charged with burglary and other crimes.
Investigators say the group stole more than $26,000 in cash and jewelry in a series of break-ins in two Medford developments in October and November.
Bleckley allegedly allowed her grandchildren and the others to stay at her house, using it as a "home base."