Kid's the voice of reason in the family. I don't have kids and never understood what it is that makes people continue to have children once they have one or two. It's like the floodgates open up.
I don't know a single person who has had a child on purpose, or wanted that child when it happened by accident. This also never once stopped them from having more kids in the future.
I think they worry that only children turn out weird. Or, alternatively, they realize that their lives are already basically over because they have to devote themselves 100% to their progeny, so they figure more kids will lower the chances of having all duds, causing them to feel like they have wasted their time on this earth.
Of course, crazy racist right-winger fucktards all over facebook keep sharing this with captions about SEE THIS IS THE PROBLEM WITH WELFARE BROODMARES so I'm not sure uploading this for the world to see was a great idea.