The Turks love children and generally love to make a fuss of them - but I'm sure if you tell them she is very shy, she will be fine. As you say, it may even help to bring her out of her shell a wee bit - you'll know best how to handle the situation though. I'm sure the Turks wouldn't want to upset her in any way, as they do tend to go out of their way to make sure the children are enjoying themselves.
I know my son (who's now 15!) found it a bit of a culture shock the first time we went to Turkey, as he was not at all used to being cuddled and even kissed by strangers!

He's getting used to it a bit more now though...