The different models have different heights so you'll need to resize them. It looks like you're using La Femme and one of Alyson's variants (I'm guessing Maria). Alyson was on the shorter side while Lafemme is rather tall.

While my first guess would be the same as hborre's, that the hair is parented to the daughter's arm, I see that the pubic hair cap is also in the wrong place. So the question comes, are the parented wrong, or did you do something unusual in moving the mom? Did you move her with the body, or with the hip?

And as hborre said, so many lights can slow down the screen response which I have had cause me to drag and drop things unintentionally in the hierarchy pallet, if you have that open. If you need them all for a render, you can turn several of them off for the preview. Select a light and then on the properties tab of the parameters' pallet, uncheck "include in open GL preview."

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