let me add my congratulations. you have done well, keep it up until you hit your goal. as far as sit ups go, you cannot spot reduce fat. fat will come from everywhere not just a worked area. the only thing sit ups will do is strengthen you abs, not lose fat. the amount of cals burnt doing sit ups is usless. as for your boobs getting smaller, although it is depressing, its probly good for you, your body will natrually make itself proportionate.