'Milk Siblings' Breastfeeding Photo Stirs Controversy

A mother is criticized after posting a photo online of her breast-feeding a friend's child.
4:14 | 08/12/15

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Transcript for 'Milk Siblings' Breastfeeding Photo Stirs Controversy
Welcome back to good -- are you looking for the hot button. All right. We found it. Look at this photo, it's being shared by a lot of people right now. One woman breast-feeding her son and her friend's child at the same time. She calls the kids milk siblings and it's igniting a firestorm on line. Rebecca Jarvis has the story. Reporter: This morning, a remarkable photo sparking major debate. A woman breast-feeding, not just her own baby but her friend's son as well. I feel like he's my son. And I treat him as my son. Reporter: A Pennsylvania mom wanted here son Matteo to breast-feed, even if she couldn't do it myself. I knew what was best for my son. Reporter: He began reacting badly to formula. Her friend offered a unique solution. When she offered I was just nothing but thankful for it. Reporter: Have you ever nursed another person's child at that point. No, it was very natural. It seemed very natural. Reporter: While many are applauding the gesture of friendship, some taking issue. One writing, I found this picture disturbing. The world health organization lists a health wet nurse as the best alternative to milk from an infant's own mother. If she's healthy, if she's substance free, it shouldn't be a problem. She Nie's not only the woman to share her own milk. I thought about it. Am I being disloyal to my child by giving her milk away. I actually think that my baby would be very proud to share her milk. Reporter: As for these two frechbdz, they not only describe their sons as milk brothers, they're now raising them together under one roof. Moving in with Jessica and her husband two months ago. Is this the family of your dreams right now. Right now this is what works. Here we many now Dr. Jennifer Ashton. Jen, wet nurses used to be common, this is a modern-day equivalent of that. It is. This has been going on since the beginning of time and it is still going on in other parts of the world. We get emotional with anything to do with the breasts. Part of it we need to uncouple the breast as a functional body part and a breast as a sexual object. There are concerns, like, physical health concerns about what that mother is giving someone else's child on a physical level and on an emotional level as well. Right. I think those are valid issues to raise and discuss. Breast mill ask a bodily fluid, can you transmit infection? Yes. That's always important. But the social issues, this is not child abuse. This is child care. This should be a judgment-free zone. It's not for everyone. But it's if that mother, that child. If you're a mom, you're having problems for producing milk are there suggestions to boost your production. 100%. This is what I recommend, relaxation, hydration and stimulation. For stimulation, breast-feeding is best, because the baby can drain two to three times. Natural supplements that can help a lot also. Dr. Jen, thank you so much we should mentioned, we asked you, should a woman breast-feed a child other than her own? 24% said yes. 76% said no. David? Apply that to the next story, Alicia keys, she's actually opening up about her style.

This transcript has been automatically generated and may not be 100% accurate.

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