Since I haven't actually seen this 'A New Christmas Story' myself, I can't accurately tell you who Ralphie's wife is. It could be a character that was created specifically for this new version of the story, but without watching it or having more information, we're left in the dark.
There is no information indicating that there is such a story as 'ralphie's wife christmas story' in the common Christmas story collection. So it's not possible to say if his wife is mentioned.
The movie 'A Christmas Story' is centered around young Ralphie's desires for Christmas gifts like a Red Ryder BB gun. There's no information about his wife because it's not relevant to the plot which is about his childhood during Christmas time.