My husband's father's wife (it's complicated... he's been married a few times so she isn't exactly a 'step-mother') has lipedema... this is what it really looks like.
Lipedema Overview and Etiology
It's very noticeable the difference in the way the legs are shaped. It's not just heavy thighs but excessively fatty calves and ankles as well.
It also quite a contrast to her upper body which does not look like that at all, and is rather thin though it is soft.
She has some real mobility issues due to the pain it causes her.