Okay-- here is the thing.. if you're planning on losing body fat, chances are you're going to lose fat in the breast. The breast is made up of tissues, glands and fat. Some women are smaller with bigger breasts because they have a lot of breast tissue-- others have more fat. (it's genetics!)
Because I am a work out nut I can give you some tips i've used to keep my butt/boob size to the best of my ability while burning fat--
Do isometrics, focus on one area of the body and work it out. Stay away from cardio, cardio is most likely what burns fat the best imo but you will get more of a runners body than a shapely one. Do weight training. Burn fat on your tummy by specifically working out your core, isometrics & calisthenics-- focusing on one area will burn fat in that area and keep the fat you want in other areas. I work out my arms, core and butt/legs religiously. As long as you are working out with resistance (weights) you will gain muscle.
I do back and chest in moderation.
if you want to perk your breast up with exercise http://www.shape.com/fitness/workouts/ch...your-boobs
these will keep your pecs tight which will cause the muscle under your breast to lift them but I have found they tend to look a bit smaller-- I don't really do these. If I am worried about lift or perkiness I would look into the noogleberry
imo as long as you are nourishing your body with healthy fats, water, vitamins, amino acids and the hormones for breast growth ( http://naturalremedysite.blogspot.com/20...reast.html
) and good things to fill up the breast and promote breast tissue, you can do all of these things and maintain boobs.
if you have any Qs just ask-- take a look around the forum/threads to get some ideas-- I have a few in mine, feel free to lurk! lol