Perhaps I have the details wrong, but Josephine's inability to conceive a child with Napoleon Bonaparte seems to have led directly to their divorce. So basically, what if Napoleon had successful fathered an heir with his first wife? Now I know that Josephine had an affair at one point, so let's say the timing of the conception is such that Napoleon can be fairly confident that the son is his. Now we get to the question of timing. That is when would this alt Napoleon II be born? How would the presence of a male heir before 1810? How are the Napoleonic Wars impacted? What difference, if any does this change make?