Your comment goes beyond harsh to heartless. True, when the lady first rented she must have known nothing was cast in stone, so to speak. However, she had no reason to believe that when the time came to move out  -- no matter the reason -- she would not be able to find similar accommodation at a comparable price.
In any case it is a mistake to see this  article as a specific. It is symptomatic of a broad problem, which is failure of government at all levels to ensure an adequate mix of housing to suit all needs.