I finished writing my novel and everything was fine - then I discovered that I needed sub plots! The problem was, the novel was too short, and the general advice was to create sub plots to make it longer, and\or write more description. I created a few sub plots but now have the problem of where to insert them in the main story. I've more or less worked out that the characters in the sub plot and the scenes in which they feature appear and re-appear at various points in the main story. To be more specific, I had one sub plot scene in chapter 5 and another sub plot scene in chapter 10. This is quite a distance away, and I wonder if readers will find it difficult to connect the second sub plot scene with the first. To remedy this I've briefly reminded them what happened in the first scene. Does anyone have any views about the optimum distance between sub plot scenes, if there is an optimum distance?