sister, nnnnnnnnnnnnnggggghhhhhhhh!!!!!!!!

i hate my sister sometimes, for example she has a project to do and i offered to help, i did quite a lot (eg. it is thanks to me she has her rugs and cushions) and all this time she has been treating me craply but i still helped, so when i finally had enough she acted like she couldn't figure out why! she does this kind of thing all the time, even to my parents