It's sad, really.
Has there been any attempt to quash the subpoena? Or is Ms. Fuddy just ignoring it because it doesn't seem to be a valid subpoena?
what is not valid about it?
Not a lawyer, but having spent five years in court in a custody “death match” it is generally not wise to ignore filings by the other side. It is best, in my experience, to point out to the court that the filing by the opposition is invalid and why.