1) Jeffrey prayed that woman was as good as her word. This means that Jeffrey hoped the woman was reliable/trustworthy.
2) She went south. (died?) She could literally have went somewhere in a southern direction or her physical condition could have deteriorated... It's impossible to say without context.
Deteriorate or decline, as in The stock market is headed south again. This expression is generally thought to allude to compasses and two-dimensional maps where north is up and south is down. However, among some Native Americans, the term was a euphemism for dying, and possibly this sense led to the present u