Prunella's Father in Marc Brown's/PBS's "Arthur" Franchise

In the Arthur franchise, we need to know the whereabouts of (and the real deal with) Prunella's father.

On the Arthur TV show, we've seen Arthur's mother, Arthur's father, Francine's mother, Francine's father, Buster's mother, Buster's father, Muffy's mother, Muffy's father, Brain's mother, Brain's father, Binky's mother, Binky's father, Sue Ellen's mother, Sue Ellen's father, Fern's mother, Fern's father, George's mother, George's father, Jenna's mother, Jenna's father, and Prunella's mother...but not Prunella's father. We didn't see Fern's father until Season 11, but we saw him again in Season 13, and as early as Season 2 Fern's still unseen father was mentioned to have taught her about computers. Prunella's father has never even been mentioned once on the show, although Marina's unseen father has been mentioned to work for a wildlife reserve.

Even in the Arthur books, we can't find any trace of Prunella's parents in the text or illustrations. The only "official" mention of Prunella's parents (yes, her parents, not just her mother) is in the Arthur website game, "You've Got To Be Kidding".

Does Prunella's father travel like Fern's? Are Prunella's parents divorced like Buster's? Is Prunella's father dead? Is Prunella an illegitimate child? Was Prunella conceived artificially? If not, then what is the story behind Prunella's father?

It is about time Prunella and Rubella Deegan's father were revealed to the public.