Convo in the VW.

Today I had the day off so Viv and I (of course) went shopping. This was my favorite conversation that we had in the car . . .

Vivian: Mom, why is there someone else in my class named Vivian?
Me: Your name is Vivian, but his name is Vivi-on. The names are both spelled the same, but pronounced different.
Vivian: Why do we have to call him Vivi-on?
Me: Because that is his name.
Vivian: Can we call him something else?
Me: Sure. Sometimes we call you Vivi or V
Vivian: OOOH MY GOSH, SIS!
Me (puzzled): Did you just call me SIS?
Vivian: Yes - Sometimes I like to call you SIS, mommy.