I have a book from the Original Narratives of Early American History series entitled "NARRATIVES OF THE WITCHCRAFT CASES 1648-1706" Edited by George Lincoln Burr, L.L.D., Litt.D. (Professor of Medieval History in Cornell University) and published by Charles Scribner's Sons of New York in 1914. In it I found a letter written in Salem Prison July 23, 1692 to Mr. Mather, Mr. Allen, Mr. Moody, Mr. Willard, and Mr. Bailey. The note following states "The Boston Tory Joshua Broadbent, writing on June 21 from New York, reported that 'Mrs. Moody, parson Moody's wife is said to be one' of the witches".
I'm not sure if this is the Mrs. Moody you are seeking, but hope the info is helpful.