"I would never do anything to harm anyone else's baby," Kincaid said.
"I feed my baby the same milk that I'm selling … I've had thousands of e-mails, back and forth, between people before they buy milk because they want to make sure it's the best for their baby and I as a mother can understand wanting to be cautious," she added.
Ironically, Vainshtok isn't so sure she could overlook the caveats if the tables were turned.
"Not from a perfect stranger – maybe if I knew the person, I might be willing to do it. But doing it over the Internet from a perfect stranger, just seems a little bit strange to me. And yet you're the perfect stranger. Absolutely and of course I have all good intentions so I'm definitely doing it the proper way. But you never know," she said.