Student Exchange Programs

I emailed one of my instructors, asking her to consider bumping up the presentation my group and I were supposed to give on our joint project (a 10-page paper). As support for my argument I offered the fact that I had done 75% of the work and that the day following the day of the presentation I had two 300-level Bio course finals. Well, in lieu of responding my my question, she went ahead and forwarded my original message to one of her advisees, who also happens to be one of my partners.
Yesterday I met with my group, which attacked me and said that the teacher didn’t believe I’d done all that work (which I did do, and I can prove it as I have saved all the responses group members sent me, bad grammar and all).
I have already exchanged additional emails with the instructor and have requested that her department chair meet with us. (I will be bringing in my work and the work my group members emailed me).
I was just wondering, isn’t her forwarding that email unethical?
This exchange happened AFTER the completed paper had been submitted.
The agreement my group’s members had is that each write a response to all of the three questions the instructor had assigned and wanted to see answered in the paper. I only had one person send me resonses to all 3 questions, however they were below the length minimum and were written very poorly, to the point of being mostly unusable as they made little sense.
Also, she had attached a pejorative comment about my alleged “perception” of the amount of work I had done and sent it along with the forwarded message.
All of your answers are OK, and the fact is that I have their work and I have my work and the two can be compared side by side is a clear indication of what was worthy of going into a cohesive final paper.

Moreover, I only offered that as evidence because I didn’t think asking her to move our presentation forward was unreasonable seeing that I’d done a ton of work already.
And oh, yeah, by the way, we were all told that we would have the chance to confidentially evaluate the members of our group after the paper was completed.