Number what?

Yesterday Addi was a little under the weather, so she hung out with me, Andrew and Sybil.  

We did some laundry, cleaned up her room and rested.  

While in my morning cleaning mode I walked into the girls bathroom while Addi was going potty.  

Feeling intrusive I apologized and grabbed the glass cleaner. 

Addi quickly said, "Don't worry Mom it's only number one, not number two or number three...." Then she giggled.  

I laughed too for about a second then timidly asked, "What's number three....?"