i think diane was even more inbred than charles
what they need is healthy infusion of mutt genes.
There’s something to be said for hybrid vigor, some attribute the success of the United States economy to outbreeding due to successive waves of immigrants, to some extent. Not at all sure that this will continue to be the case, since the “melting pot” is being actively discredited and immigrants are being encouraged to remain insular and not intermarrying rather than entering the society as a whole.