How old are you? My turn now.

In the back seat of the car, Keke asked me the same question that she asked her mom, "How old are you?".
I told her that I am older than her mom.
Keke then asked again, "give me a numer." 
I replied, "I am three years older than you mom. So can you tell how old I am?"
Keke then asked no more questions, she did not know how to do this math so far.