What if Mary, Queen of England and Philip, Prince of Spain had a son. According to the marriage treaty he would inherit the Netherlands and the County of Burgandy. If ITTL, history continues as IOTL, by the end of the XVIth century we would have 3 Hapsburgs dynasties; Spanish, English and Austrian. At the same time Mary, Queen of Scotland and Francis, King of France have a son, Robert. Would there still be a revolution in the Netherlands? How would the Franco-Scottish Religious War develop?