Mommy, I have a question

I had a hunch this question was coming, but had cleverly been avoiding it.  It started a few months ago when Elizabeth asked about Aunt Amber's baby under her shirt.  She seemed to be content with the explanation that babies stay with her mommies so they can grow.  Apparently, she had been thinking about this for awhile because this week she asked me again.  "Mommy, how does a baby get in the mommy's belly?"  Yes, I understood the question, but responded with, "the baby stays in there to grow until it is ready."  Our good friends just had a baby and I know she overheard some of those conversations.  I look down at her and realize she is looking at pictures from her baby book and it is a picture of my bare pregnant belly.  I know at this point my answer is no way going to satisfy her.  "Mommy, I know that, but how does it get in there?"  She is three and half, I am racking my brain, I have no good answer for a three and a half year old about the birds and the bees.  "Let's ask daddy when he gets home and we can talk about it together."  Maybe she will forget.  Well, she did, but only for a day. 

We are on our way to dinner Saturday night, in the car and we hear, "Daddy, I have a question. How does a baby get into a mommy's belly?"  Brandon and I do that side look out of the corner of our eyes at each other.  Ok, big boy, you are on, what's your answer?  "Well honey, they swim."  She chews on this for a few moments.  "Daddy, babies can't swim!"  She's so sharp.  "Actually Elizabeth, they can swim, but then they loose that skill and you have to relearn it, like in swim lessons."  He whispers to me, I think that is right, isn't it? Well, she buys it.  Later that night we rehash the discussion and Brandon prides himself on the fact that he gave her a scientifically correct answer.  Swimming is a part of the baby making process.  I know how she is envisioning this and it may be a bit of a stretch but for now, this explanation will work.  Now she says, "Daddy knows all the answers!" Last week, it was mommy who had all the answers!