Can I have a family lunch during my weight loss?

If you lose weight, you can have lunch for the whole family, but you can't eat too much, because if you lose weight, it is actually about one calorie, which means that the intake must be less than the consumption. So in this case, if you eat too much lunch during weight loss, you will get fat, especially some fried foods. Don't eat, then eat less. I hope my answer can be adopted. Thank you.