DD is almost 9 months old and she's such a sensitive little thing!!

She has started pinching and scratching me on the chest when I pick her up and I'm trying to teach her not to. When she does it I say 'Ouch, no don't pinch, that hurts mummy' and move her hand. I don't say it loud or angry or anything at all but she is soooo offended!! LOL. She drops the lip and tears well up in her eyes!! I don't want to upset the poor little thing, just teach her, but I'm really not raising my voice, I don't have a mean expression or anything, wth?

I remember when I was a kid being sensitive too and getting upset if I got into trouble for something and feeling really bad like I was bad and I never want her to feel that way!!

So, any suggestions how I can start to teach her 'No' without upsetting her?