Babies are so cute. How can you not have one?! I'll babysit!: Babies are adorable, everyone can agree on that, but just because something is cute (like a puppy) that's not a good excuse to say, "I should have one." In addition, there are twice as many not-so-adorable moments that come with having a baby.
You'll change your mind in a few years: She might. She might not. Some people know they don't ever want to have kids right away, and some do change their minds down the line. It's her decision, so don't hold your breath waiting for the answer you want to hear!
Well, at least you have your dog or cat: Childless friends don't want to automatically be associated as the crazy cat or dog lady. Yes, they love their pets like they would their own kids, but it doesn't mean that's ALL they have in life.
You know, you don't need a partner to have a child!: If a woman is single, people tend to assume she doesn't want children because she hasn't found the right mate. While this is true in some cases, if a woman really wants to have children she will find a way, single or not.
You and *insert partner's name* will have the cutest kids! So when is it happening?: A couple's decision to have children is a private matter, so unless they bring it up in a conversation, it's best not to ask. They might have infertility issues or they might just be waiting for the right time, neither of which concerns anyone outside of the relationship.