Dear all,
Could you please check the following sentences to see if they are appropriate and native-like? I'll very much appreciate it.

For a French restaurant, fish is the most difficult food to cook. If a chef can cook fish very well, he must be a fabulous and professional cook. So, only a gourmet knows to order fish.

The woman is thick-skinned and brazen. It is obvious that she is taking advantage of the man. She is a guest, but she doesn’t care about how much the foods costs. Instead, she just keeps ordering food.

20 years later, the woman becomes very fat, weighing 136 kilograms. She has eaten the fruit of her own doing. The man is glad because her love for eating makes her become a fat woman.