Basically, it won't be very fat, but if you don't pay attention to controlling your food intake and can eat by yourself, you can't guarantee that your child will be thin.

14 years old is still very young, it is time to grow up and eat, so weight is not important now.

However, if both parents are thin, the chances of children being overweight are relatively small, because thin people are usually not well absorbed by the stomach, which is also hereditary. It's hard to say if one of your parents is overweight, so if your parents are overweight, you won't be obese. It's best to meet my aunt. Most girls are with her. If your aunts are not particularly obese (preferably when they are young), then there will be no problem.