Field trip and a little education (or I'm proud I didn't hurt a 7 year old)

Today I had the pleasure of going on a field trip with my middle guy.  He's mine forever so I am allowed to tell stories about him without breaking foster care rules.

My son is hispanic with shiny dark brown hair, gorgeous skin, and almond shaped eyes.  He's full of personality and kids are drawn to him.  As we toured the zoo together it was obvious lots of kids know him.  We gathered back with his class for a picnic lunch near the end of the trip.  I was helping make sure all lunches were passed out, hands sanitized, etc. About that time, my son called me "mom" because he needed help.  When I came to help him, one of the little girls took notice.  We had the following conversation in front of my son's class and several parents.  

Little girl: Are you his mom?
Me:  Yes. (notice I do not offer more information)
Another little boy:  "my son" is adopted.
Little girl to me: is he adopted?
Me to my son: are you adopted? (I gave him the control here so I could read his comfort level)
My son: yes! (completely confident, no hesitation)
Little girl:  oh so that's why you don't look alike.
Me: that's right, but I'm still his mom.  I still do all the mom stuff even though we don't look alike (as I'm peeling his orange).
Little girl: so where is is REAL mom.
Me:  I'm right here, I am his real mom.
Little girl: no I mean who gave "my son" away. 
Me (fully aware that every child and adult present is waiting for my answer): no one gave "my son" away. 
My son: I've got two moms! One in "place where he was born" and one right there! (said so proudly and with great love for both of us)
A few kids did try to argue the point, but I assured them that he does in fact have two mothers.

Another mom later told me she thought I handled their questions well.  I was just glad that I reigned in mama bear when sweet precious child asked who gave my son away.  But it got me thinking.  I have had many conversations about adoption with my children.  We pray for all birth families represented in this house every night at bedtime.  This is our normal, and we have done our best to prepare our kids for the curiosity of this world.  They typically handle themselves very well in these situations.  I was glad to hear my guy share a tiny bit of his story with confidence, love, and pride.  

**Here's my quick request for families who are not built by adoption.  When your children ask you questions about how my family is built can you please not use the words "real mom" or "give away".  I am real.  My son's birth mother is real.  No one is fake ( the opposite of real).  He has a first mom, a biological mom, a tummy mom, a birth mom - any of those names will do.  He also has me.  He has two REAL moms.  No one gave my son away.  He needed a family due to difficult circumstances in his birth family.  Thanks.  That would help us adoptive moms out a bunch.