She does look skinny to me, it's more that she is not that tall as she is trying to convince people
Also from my personal observation, she is a typical example of a woman with eating disorder :
* prefers to wear black to look more skinny even she is already like this
* always mentions that her clothes needs to be tailored or cinched in even thought it's not needed it
* she does look quite happy when even the smallest sizes don't fit her, because it will mean she is even skinnier (in her own eyes )
* picky with the food constantly