Quick and dirty fix.  After you get her scaled export as an obj, then reimport as an FBM (full body morph).  T hen check the triangle by that morph name and "match centers to  morph".

As it looks to me,from your screenshot,  your start center is up in her back instead of down on her thigh (Im assuming your bending her thigh), thats why your getting the distortion.

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Consider me insane if you wish, but is your reality any better?