I think the baby cat is out of the bag

We have learned an interesting fact the last few weeks. People (including nurses and doctors) don't ask you if you have told your older child what is going on with mommy. This strikes me as strange, since especially this early, bad things can happen and if they do, maybe a three year old would be better off being totally in the dark about the whole thing. I'm really not uptight about it (given my nature), it just strikes me odd that even when I was like 5 weeks along a nurse would say to Scout, "So, do you want a little brother or a little sister?" Scout answered -for the record she said sister- but she kind of shrugged off the question like, "why did this lady ask me that?" Rob and I don't talk about it in front of her at home, but she is certainly picking up a lot of this talk on the street!
On our appointment on Thurs. when the doctor was looking for the heart beat, he asked Scout about the baby in mommy's tummy. He asked her if she knew there was one, she played it cool and said yes (by now, she has probably picked up enough to have it figured out). -Well, as well as a 3 year old can work things out in her head. Here is a conversation we had yesterday:

I was on the computer in the office and Scout walks in:
Scout: Mom? Is there a baby in your tummy?
Me: (a little cagey) Maybe
Scout: (with a look of concern mingled with a hint of disgust) I think you'd better spit it out.

This morning's conversation:
She comes in and crawls into bed with me with a little bear beanie baby wrapped up in kiki

Scout: (looking at the bottle of prenatal vitamins on my nightstand) You better take your medicine.

Me: I took it last night, I don't need anymore right now.
Scout: But you need to take it so the baby goes away
Me: I don't want the baby to go away
Scout: Why?
Me: Because the baby is going to grow for a while and then it's going to be your little brother or sister
Scout: Oh. (then lost interest and went back to caring for her baby bear)

I am just going to let her ask questions at her leisure and see what happens. I know she is dying for a brother or a sister. She just obviously doesn't quite get it, but is on her way. For now, I am enjoying her questions and can't wait for the next one. I'm surprised she linked the vitamins to "baby medicine", that's pretty good. Now, we just need to get her to understand it's not something akin to a cold or flu (although that could take as long as 20 years).