I believe when it originally happened to Mark and everyone was visiting him he probably was not focused on his future but just physically getting over everything. If it was me, when I first got home after months in hospital and all my friends were either working or in school the reality would set in. As far as I could tell Mark was starting to get upset about things and it can be very lonely all day on your own in a house. I would call to Mark drag him out for a walk and a chat or even call up to watch movies to keep him company. I probably was not the best visitor as I can get awkward make him laugh or even hit him and forget that this was all painful for him.