PIERRO, Mary A. (Santosuosso) A life-long Lexington resident, Sept. 24, 2015. Beloved wife of the late William V. Pierro. Loving mother of William G. Pierro of Lexington and Carol A. Hulehan of Billerica. Sister of Ben Santosuosso of Lexington and the late Caroline, Sam, Chet, Nicky, Helen, and James. Mary is also survived by a granddaughter, Kathleen, and by many nieces and nephews. Funeral from the Douglass Funeral Home, 51 Worthen Rd., LEXINGTON, Tuesday Sept. 29 at 9 a.m. followed by a Mass of Christian Burial at Sacred Heart Church, Lexington at 10 a.m. Relatives and friends are kindly invited to attend. Visiting hours Monday from 4 p.m. to 8 p.m. Interment Westview Cemetery, Lexington.