‘Twas not quite the night before Christmas when Norma, Michaela’s Mum, arrived, it was in fact the night before the night before, but with Norma being blessed with a Christmas Eve birthday there’s a need for the indulgence to begin long before any obscure character in red makes his way down the chimney. Mexican – or, for the purists, Tex Mex – food kicks off the weekend with beers, G&Ts and red wine helping to start the fun. Of course, I’m absolutely certain that the booze plays no part at all in the moment immediately after dinner when my inner Mr Clumsy comes to the surface and upends an open…