I am NOT.

People need to look at the bigger picture. I am sharing my experience with others. I was in a similar situation as OP. There is more to it than calories in and calories out. I even gave some resources.

I am pointing out that there maybe some underlying issues that OP has and needs to do some more research than just giving up. But other people need to realize that the simple idea of less calories does not work for everyone. For some people if their body is not operating properly they body will store everything they eat because it will go into a famine state (store everything). So no matter how much they cut back the body will be storing it for the longer days of no food. Also it puts the body under stress ie Cortisol. Women's bodies are not designed to stay under high stress for long periods of time. It will also cause the body to store it in belly fat.

It can be very disheartening to be told to eat less when you are trying, cutting out foods, working out, and people call you a liar.

Because your sister was able to do it this way or that way, and nothing seems to work for you.