A few points, female fertility declines steeply past 40, but males not so much, so older males could conceivably father children with other females.

Dare I say it, and this may just be not right, Genghis Khan is purportedly supposed to have fathered thousands of children it is said he had 500 or so secondary wives (citation needed).

Since average (mean) income is famously a bit pointless due to a few very rich people, wouldn’t father’s age at conception be similarly effected?