Tell her to avoid milk. I have plenty of knowledge on the crap they put in it that is can and does in fact cause Lupus. If she uses milk, tell her to stick with organic or fresh farm milk.
As for what to do...
MSM works wonders for the joints. Its natural sulfer and something that is far more important then calcium. I know with Lupus the body and joints can ache badly. Tell her to get some organic MSM pills or powder. I got mine from luckyvitamin.com the brand is called "Now". I also use the MSM lotion too! Its not expensive at all!
If she is serious about getting better, have her get silver. It has cured cancer and disease but many people know nothing about it because the medical industry cant make their big bucks using something that cures with no side effects.
Also tell her to stay AWAY from high fructose corn syrup of any kind! That man made cheap crap sugar is the root of many diseases in the US.
The silver is a liquid supplement taken orally, It will detoxify her whole entire body. It will replace bad cells with good, feed her blood oxygen and save her life.