Riggi of Billerica, September 2, 2016, Dorothy A. (Cestone) Riggi, age 88. Beloved wife of the late Joseph L. Riggi. Devoted mother of Jane Coffey and her husband, John, of Billerica and Scott Riggi and his wife, Paula, of Marion. Loving grandmother of Jessica Thompson, Seth and Joshua Coffey, Mathew, Michaela and Andrew Riggi. Also survived by four sisters, Elizabeth LaRosa, Anita Graziano, Irene DeSantis and Margaret Ferrara. Funeral from the Burns Funeral Home, 354 Boston Rd., (Rt. 3A), Billerica, Tuesday, September 6, at 8:00 a.m. followed by a funeral mass in St. Mary’s Church, Billerica at 9:00 a.m. Relatives and friends invited. Visiting hours, Monday, 4-7 p.m. Interment, Fox Hill Cemetery. www.burnsfuneralhomes.com