She explained that while Terri is not `` the most palatable person '' , she is at least faithful to Will , while he has `` a wandering eye '' and treats Terri badly in `` The Substitute '' .
She said that while Terri is not `` the most pleasant person '' , she is at least faithful to Will , while he has `` a wandering eye '' ( has interest in another women ) and treats Terri badly in `` The Substitute '' .