As you exercise and lose fat, your muscle size will increase. Since muscle tissue weighs more than fat, you may actually stay the same weight as you lose fat and start looking and feeling better. If women lift weights they will develop large, unattractive muscles. The body makeup of men and women is very different. There are different hormones and body tissues.
Men have more muscle tissue, naturally, than women and women have more fat cells.
For women to develop and show large muscles, they must work at it by training long hours and working to reduce all their body fat. Under normal, or even strenuous, exercise conditions a woman will not develop huge muscles. If you have a fat stomach, lots of sit-ups and stomach exercises are needed. You can't remove the fat from one area and leave it in others. While specific exercises will increase the size of certain muscles, fat must be reduced over the whole body.