User blog comment:Heinz84/Could Dr. Doofenshmirtz be Phineas and Candace's Biological Father?/@comment-1647442-20100826021604

In fact (Though I know it's impossible as I previously stated), in the IRC, during our current series of RP, Doof is Phineas, Candace, Stacy, and Ginger's father, and Aloyse Everheart Elizabeth Otto Wolfgang Hypatia Gunther Galen Gary Cooper von Roddenstein is Irving and Albert's father. It's explained like this: Doof had three wives all at once - Charlene, Linda, and Dr Hirano. I know, it's odd, but makes sense in context.