Mom do you have a ......?

I love it when the kids starting realizing their moms are more than just moms. Today I was asked if I had a sister? Yes.
When you were school were you in the same grade? No, my sister is MUCH older than me. (It is important for them to realize she is older than me, hee hee.)
You have a sister? yes
Who is she? Aunt 'Shell
Aunt 'Shell?, I thought she was your mother. Priceless, hee hee. Aunt 'Shell will be none too happy about that. "NO"
Well who is your mother? Grandmama
Grandmama?, but she is Grandmama....
A lesson in what it means to be Grand-ma/pa.
Lights begin to click on.
Then...do you have a brother? yes...