Am I a bad candidate for BBL because I have wide hip bones? (Photo)

I'm interested in having the BBL but worried about the outcome. I have a flat, square butt. The top of the "square" is where my hip bones are (not much fat at that point). I'm concerned that those points won't be able to be reduced to give the upside down heart shape I'm after. Would the bottom of my butt (hips) have to be extended out a lot more? Or will the BBL still leave me with that square shape (not ideal), and just give me more projection? I don't want to regret the surgery.