All valid inputs, i was just a bit fumed at my sister, she went vegetarian for ethical reasons but i hate how she's claiming vegan and she ate cheese the other day because there was nothing vegan on the menu and teased me for not doing the same. GRRRRr
See - now that's annoying. It's not particularly difficult to ask for something without cheese. Many of us do it on a daily basis.
The long and short of it is, though, that your sister is claiming to be vegan but is *not vegan* and that is rubbish.