As you know, I'm the author of the "Sugar & Spies" series, so yes, I think they would make awesome parents. Illya might be a bit standoffish, but he would love and protect his children with unparalleled fierceness. Napoleon would be extremely affectionate and would probably spoil the children rotten, especially if he had daughters. Both would need input from the mothers; one to be more involved and the other to slow down on the gift-giving.