Stuck Up Mommy

Yesterday my son had a well-visit at the doctor. My boy measures at 32.5 inches! and 23 lbs! (That's it? He eats everything in sight!) He's already halfway up to me... at this rate he'll be taller than me by the time he's five. (And what is it about the doc's office that intimidates me? When he asks questions, I stumble over each one... like when he asked if Little Man is saying any words, I could only say yes, I couldn't think of any of the words!)
Anyhoo- I took the afternoon off work so I could take him to the appt. and I ended up meeting my sister at the mall. They have a new play area on the first floor, equipped with a changing table, a reading area, and a nice soft carpet. My sister and I were the only ones there for a while, then comes in a very well-dressed mommy with her cute little four or five year old daughter. Mommy was dressed in perfectly creased jeans (I didn't know people still did that!) with high heels, her fake pony tail reached the middle of her back. My son stood looking at her cute daughter, smiling. A friend at last! Now let me start off by saying, I'm totally not judging. She's a mommy, I'm a mommy, my sister is a god-mommy, we're part of the same world. I noticed from the corner of my eye that this mommy wouldn't let her cute daughter near my son. My boy kept playing around, my sister would get into the playhouse with him and run around, but he kept looking at the cute daughter hoping she would come and play, too. At some point, the mommy took her high heels off and played with her daughter, but if my son went near them she would move away. I grabbed my son and sniffed him to see if he stunk. No poop. I checked his hands, no stickiness. Why was she treating my son like he had the plague?
My sister gave me A LOOK.
I know! I mouthed to her.
So we continue playing with my boy and after a while a few other mommies started coming in. The look on my sons face when he saw another little boy saying "Car!" was priceless. There was a mommy with two boys and a few month old girl, a daddy with another boy...I look over at the mommy with the cute daughter. Gone.
I looked at my sister. She laughed. "I guess she doesn't like other mommies!"
I smiled at the other mommies/daddy there, our children were playing together, it's nature. I'm sorry if that other mommy felt my son was invading her and her cute daughter's space, but I brought my child to a PUBLIC PLACE, I wasn't expecting the play area to be exclusively hers. I hope that little girl doesn't grow up with the same mentality her mother has, because she will be very, very lonely.