For one, the environmental impact that her family will have is staggering (the global population growth is one of the causes of climate change and a hotter, more unstable planet- there are volumes of research to back this up). This equates to more food, petroleum needed and generating more trash and waste (and more transportation needed so burning fossil fuels to a greater degree is needed). For two, it's a huge drain on governments (both now and later on when governments will have to provide infrastructure and other services). For three, people like this are often unable to provide for their kids so they rely on government and other resources which means other people have to pay for your Aunt in law making a choice (yet she's probably opposed to people making choices that involve using birth control, so tack hypocrisy to the list). Four, 8 kids out in public is a nightmare. I've seen families like this- they've no clue as to the noise and disruption they bring when they show up somewhere like a restaurant because they think screaming children are cute and normal when I'm trying to have a quiet conversation with someone, and they're always loud (so basic courtesy and being considerate of others gets tossed away) never mind the disaster that's left behind (plus, the service industry people I know will be happy to tell you that people like this are lousy tippers). On airplanes (where I spend 20-25 weeks a year) it's even worse, because on at least a dozen occasions I've been on a red-eye flight (where I'm flying overnight so I can be somewhere early in the morning for work) where I've been unable to sleep because someone's brood is screaming and crying to the point where I can hear them through noise-canceling headphones (file under 'lack of consideration for others').