Mary B. (Hennessey) Mario, 63, of Marlborough, died Sunday, October 22, 2023.

She was the daughter of the late William J. and Joan C. (Flemming) Hennessey and the wife of Robert Mario, to whom she’d been married 23 years. Mary was predeceased by her brother, Billy Hennessey.

Besides her husband, Mary is survived by her brother, Michael Hennessey and his wife Patricia of Marlborough.

Visiting hours for Mary will be held Monday, October 30, 2023, from 9:00-10:30AM at the Slattery Funeral Home, Inc., 40 Pleasant Street, Marlborough, MA 01752. A funeral Mass will follow at 11:00AM at the Immaculate Conception Church, 11 Prospect Street, Marlborough, MA.