How thin can my waist get, with a BBL? I want my waist as tiny as possible but I have large breasts. (photos)

If the waist was smaller at one time, the waist can likely be reduced to those same measurements or smaller provided the muscular and fascial integrity has remained the same.  Kenneth Hughes, MD, Board Certified Plastic SurgeonLos Angeles, CA

Hello 
Based on your photos you are a good candidate for a liposuction with BBL and I think you'll get very good results.
Liposuction allows your plastic surgeon to transform your entire
shape. You improve your abdomen, waist, back and of course your buttock
to give you a beautiful heart shape.
I recommend you to make an appointment with a board plastic surgeon for a good evaluation and to talk about your goals.
Good luck :)

Thank you for your question.
In order to get the fat for a Brazilian butt lift to do the buttock augmentation we need to do liposuction. The liposuction can be done in various parts of your body including your back,  your love handles (flanks)  and your abdomen. Provided you're an appropriate candidate for liposuction and that you don't have significant skin looseness and good muscle support of your abdomen then it is very possible to bring in your waist significantly.
Of course, the only way to know for sure is to get an in-person consultation and evaluation by board-certified plastic surgeon who has significant liposuction and fat grafting experience.
Hope this helps and good luck!

I would have to evaluate you in person to see whether or not you have adequate fat reserves for a BBL.  This is certainly possible. Best of luck!