Sort of jumping in here late w/ my opinion-
Your DD may ask to nurse because she sees the baby doing it. This is your chance to explain why babies need to nurse, give her the "big girl" talk and tell her that the baby will grow up and stop nursing just like she did. Some will INSIST to be nursed... you can deal with that in several ways. When my son (who was only nursed as a small infant) did this, I finally said ok knowing full well that he wouldn't do it, he smiled, smacked his lips a few times like he was eating, pretending to nurse and went on his merry way.
It is unlikely that the situation will come up but there are many better ways to deal with it rather then hiding nursing from your toddler.
Melissa
