Not "how do you become?" but "but how do you know?"

So last night as I am helping Laurel in the shower..she asks me the question.  First of all, I do want to tell you the mother skill that I currently have:  I have to help Laurel in the shower but I can't look at her body because she wants privacy.  I understand..I try to comply while I make sure that the shampoo is completely rinsed but see nothing else.  But I still can't help but sneak a peak to see if her tan line is gone.  It's not and it's November.  Rachel is going to be so pissed when she realizes that she won't tan (even with sunblock) like her sister.

Anyway..sorry..digressing..as I am drying her off (and not looking), she asks me this:
"How do you know that you are pregnant?"
My mind screeches to a halt.  Not "how do you become?" but "but how do you know?"  It is freaking the shit out of me now..God forbid if I hear this ten years from now.

Where am I supposed to begin?  Menstruation..eggs..intercourse?  C'mon!  I wasn't prepared for this at 7:55 after staying at work until 7:00.  I thought this was going to happen on a nice Saturday afternoon, curled up on the couch with some hot chocolate.  I feel ambushed.  Where the hell is the BrainPop?  Another aside, BrainPop is this program that Laurel loves..little stories about all sorts of topics..science, history, literature.  Laurel loves listening to this more than me. They have even covered the drug talk.  I am hoping that I can get BrainPop to do the dirty work and explain the "blossoming into a woman" talk.

In the meantime..she is looking at me wanting to know.  Keep it simple JCW...keep it simple!  (Avoid the ovulation, avoid the sperm...)"Well Laurel, I knew I was pregnant when I peed on a stick.  It changes a certain color and then I knew I was pregnant"

"GROSS!  You PEED on a stick.  You didn't touch the stick, did you? So gross...hey is it too late to have a snack?"

And that's it.  I have bought some time..for now.  Holy Christ, when I tell her what her dad and I did to become pregnant, she is really going to be grossed out. I still am...