There is nothing like a second marriage. Marriage is the union of body, mind and soul which you already had many times in your life. In Astrology, marriage for the first time in one’s life is only indicated and thereafter it can be repeated any number of times with one or more persons. Do read my articles on ‘Definitions in Astrology’ on http://navagrahastro.blogspot.in/
It is only wayside astrologers who predict multiple marriages without any knowledge of the science underlying Astrology.