Fat transfer to back of upper thighs to balance my BBL.

Hello, just wanted to know if getting fat transfer to back of my upper thigh area (under buttocks) is OK and normal, to balance out my bbl. Although I am requesting for a SUBTLE bbl, my legs are very thin this area. It would only makes sense to me, as most bbl look so unnatural otherwise, (including the great Kim Kardashian's). I am requesting to have this procedure done in addition, but it is of some concern, as I seem to be in the minority. Please advise. Thanks.