I think I have a solution to some of the problems with Mrs Grundy...!
Exercising my MAGNIFICENT MULTI-LINGUALITY , I have interpreted Deux ex Machina to mean Two Machines . ( I'm clever like that).
With one of these machines ( robot) designed in my image , and given the strength and lifting power of a robot , Mrs Grundy can be carried (and/or thrown ), and she would have no reason to suspect the change !