Thanks everyone for all of your responses. I talked to my sons teacher at the center this morning about the rude woman. It was a bit awkward because this woman is also her friend. She tried to stay real neutral on the issue, but said with my son being gifted some jealous reactions are to be expected.

His teacher advised me to try and talk with this woman directly and resolve the issue, or take it to her superior.

I am not going to bother talking to this woman directly, I think she will be offended or act phony and I don't think any progress will be made. She seems quite immature.

I am going to send an email to the director regarding the issue of this womans inappropriate behavior. I am going to let her know this is why I do not want to bring my son up to the center anymore.