Mommy is very friendly!

I was driving my kids to daycare while we encounter the usual traffic.  The car was crawling just before the traffic light when a car that came from the parking lot needs to exit to the lane we are on.   I let him pass by making a "pass" gesture by moving my hand from left to right.  Braden, so confused with what I was doing, then said , "Huh? Mommy, why you just wave at everybody? You wave at all the cars??"  So I replied, "Yes, mommy is very friendly!"