Mary Wallis, daughter of Nathaniel and Margaret Wallis, married Samuel Pike, son of Richard Pike and Elizabeth Andrews. (The Maine Genealogist vol. 29 (May 2007): page 51-68, see p. 54. "The Nathaniel Wallis Family of Maine and Essex County, Massachusetts," by David C. Dearborn FASG and John Bradley Arthaud FASG.)
It makes me wonder if the Mary Wallis you created is attached to the wrong Samuel Pike.