Hi Donald
I have moved your post, because we ask people not to ask a question within someone else's post as it can get confusing.
I would advise you to get onto the DWP as soon as possible and see if they will extend your wife's current award. Plenty of people have been given extensions so it is worth asking. If the first person says no, ask for a call back from a manager to explain the situation. You are entitled to the phone call - so insist on one. Otherwise, as it stands her award will end, as will the money and you would then be forced into making a new claim. You could also ask them if they could do a paper-based assessment, rather than put your wife and yourself through additional stress.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems