Exactly how did the wife of the man in the wheelchair die?
shareOfficially as explained in the film it's pneumonia she died of but it's implied she died of the abuse inflicted upon her by those dirty droogs,
shareThe movie says she died of pneumonia, the writer feels it was because of what happened.
I think it's left up to you to decide if it was pneumonia or the writer's belief that it was the assault.
Although the writer is very unhinged after the rape and assault so he could be trying to project blame on Alex.
Either way the couples final months together were undoubtedly destroyed by that night.