Hi Jim:

Probably it's hard for her to swallow anything now. So, additionally, she 
could fast, not necessarily on water, but on vegetable broth, or maybe 
herbal tea with a little honey. The fast would last one, two or three 
days, depending on her possibilities and the severity of the condition. 
Resting and sleeping is also very important. But most important of all, 
try to establish what caused the sore throat in the first place: what 
happened before? what did she eat? etc I don't know if she already follows 
paleo. So maybe now this is a window for you to start flirting with paleo, 
if she feels like it.

Best wishes for her and for you, too.

Jose Carlos