Everybody gets irritated when the circumstances turn against him/her. Women are more delicate to negative vibes than men. Some scenarios make them mad and will react unfavorably.
1. Somebody says “you are fat”.
Unless and until she is slim and she wants to put on weight, she will get irritated when somebody says she has become fat. She would cross check your image in the mirror and planning how to reduce the weight. Additionally, you would ask your husband and friends “am I fat?” a thousand times.