From my experience, anything after the first marriage is not valid by Godly standard. It is only permitted in the portion that says,'TILL DEATH DO US PART'.
Besides this clause on no circumstance should the issue of second marriage come in, no matter how we garnish it by human standards making it look ok, giving so called genuine reasons why those who go into it do.
Now lets know one thing, God can NEVER compromise HIS standard, it is for man to strive to meet up with His godly standards.
The bitter truth is that God and Heaven does not recognise any second marriage, as far as either spouse is ALIVE on any part of the surface of this Earth.
That is the more reason why one must not rush into Marriage, it has to do with, spiritual, mental and physical MATURITY, any thing less than this can be really disastrous.
Those who are about getting married I congratulate you in advance, that you are getting prepared to be enrolled into a school where everyday is a New topic, subject or syllabus you have never thought was involved.
It is your ability to manage it in LOVE with your spouse, that is where the spiritual, mental and physical MATURITY plays a role.
Be careful shine your eyes, be prayerful and seek divine counsel, attend seminars and programs that will prepare you. Once you are in, that's it.
What happens in marriage is like crossing the bridge of relation into you MARITAL home and burning the bridge behind you. No bridge to just walk out of marriage.
You both in LOVE will stay together to solve the everyday surprises that comes with MARRIAGE.
Sorry for the lengthy input, just pouring out what I am seeing, because in am in Already and my bridge is burnt behind me. It wonderful life to be married.