I know she knows and doesn't like it, because she once said "Oh I'm so fat" in a despairing tone. I wish I hadn't just brushed it off with "No you're not. You're lovely."
She hasn't mentioned it again, and since then she has put on quite a bit more weight. She gave up gymnastics 6 months ago which was 9 hours a week of intensive training in order to concentrate on sprinting which is about 5 hours a week of training. On days she doesn't sprint she does nothing but sit/lie about.
Her diet is terrible. She resists eating fruit and vegetables, and ODs on carbs of all sorts.
I've been ignoring it, apart from occasional exhortations to eat more healthily and maybe take up another sport. These have always fallen on deaf ears, but recently even my mild comments have been met with screaming tantrums.
I guess she's telling me to back off, and I'm going to have to shut up, but I know she is hating herself, and that the longer she leaves it, the more likely she is to create a lifelong problem for herself.
I think she's about a stone overweight, and at 5ft 1 that's quite a lot.