Cindy:
If you want a medical explanation, here it is.
Emesis (the act of vomiting) is thought to be a survival trait. If the body ingests bad food it gets rid of it. Yes I know there are many reasons for vomiting, but that is one reason. I'm not at all suggesting that you fed her bad food.
Group emesis, is also thought to be a survival trait. People often react to someone vomiting by going into spontaneous vomiting. The reasons being that if one person in a tribe ate bad food then they all did and all should vomit.
That seems to be the only reason for why people often get nauseous when they see people get sick.
So it means, again, you silly git, that you are HUMAN!!!
Please stop trying to be Wonder Woman. (I've got that one nailed down for me, I'll show you pictures sometime.)
Please know that you are loved, warts and all! You are our sister!
-Sandy