2. How is the addition of that nipple valid to that story??? It was not about breast feeding.
I want to address the second point (mostly). A mother nurtures her baby. In most contexts food=nurturing. Since the article was about motherhood, it makes perfect sense to show breastfeeding. Actual BFing however, would cover both the nipple and and that adorable smile, so I think it is perfectly acceptable and the marketing ploy is in the smile, not the nipple.
while I think they were designed to show domesticity.
If you think about it, there is nothing really sexual about a breast. It's a big lump of fat that can deliver nourishment. In fact it could be said that a man's fixation on a breast could have some sort of reflection on his relationship with his mother.