There are no chances for two marriages in your horoscope. Your 7th cusp sub lord is Rahu in 2nd house. As a Node Rahu has to give results of multiple houses, as it is conjoined with Mercury, Sun and receiving aspects from Saturn, Jupiter and Moon. Jupiter is the 7th house lord.
In Rahu sub period 18-10-2017 to 19-02-2018, you have to face tensions. But there is no chance of separation.