Also, there is something deeply wrong with the girl behind the dad. Her knee should not be there based on what we can see of her shoulders. Their politics apparently involve having hellishly mutated children with their six fingered, yellow handed wife.
Perhaps this is why you don't make children with your sister, who is also your aunt? The kid behind him, she is like a snake but the baby on the dads lap has no legs.
You thought it was AI, but she just has ulnar polydactyly. How do I know this is ulnar instead of radial or central polydactyly? The wedding ring, it's on the ring finger.
(/s of course, this is obviously AI. But yeah people with extra fingers do in fact exist. They or the parents often cut away the extra finger for cosmetic reasons.)