Slack of Billerica, June 29, 2014, Barbara A. (Hoven) Slack, age, 65. Beloved wife of Robert W. Slack. Devoted mother of Robert “Beau” Slack of Chelmsford and Bethany Keating and her husband, Matthew, of Reading. Also survived by her loving grandchild Westley Keating. A memorial service will be held in the First Congregational Church, 18 Andover Rd., Billerica, Thursday, July, 3, at 11:00 a.m. Relatives and friends invited. Memorial contributions may be made in Barbara name to the First Congregational Church.