I hate her every moment of the day
I hate my sister. It's not the usual sisterly hate, it's the I want to kill you every time I think about you kind of hate.
These thoughts didn't appear until she started loosing a ton of weight due to a "stomach problem", which caused her to puke a lot. I think it was just a cover for her becoming bulimic or something. Now she's lost over like 100 pounds and I'm still fat and struggling to loose weight. It was so easy for her, but I could never do that to myself, although I think about it all the time.