(Maryland) ..... Joy Morrow-Hargrove, 32, a long-term substitute Spanish teacher at Clarksburg High School, is accused of having a sexual encounter with a 16-year-old boy, who was one of her students. Two group home counselors also were arrested on allegations they had sexual relations with the Clarksburg High School student. The boy lived in the M.S. Youth Services Group Home in Germantown, where the two female counselors allegedly had sexual relations with him, charging documents state. Morrow-Hargrove and counselors Koreen Allen Avery, 38, of the 19300 block of Hottinger Circle in Germantown, and Robin Denise Lawrence, 24, of the 4500...