1. Such second marriage even with the consent of the 1st wife is not permitted as per service conduct rule of W.B. Government and it may not be permitted as per Bihar Government service Conduct Rule also.
2. So, you have conducted a crime as per law of our Country and your State.
3. Who is standing as your nominee so far? Is it your late 1st wife? If so then you should not disclose her name as your second wife now.
4. Your case is not a simple open and shut case.
5. If any body complaints with evidence that you had married your second wife during the pendency of your 1st marriage without informing your office then you may be deprived of all the retirement benefits.
6. You can now marry and show marriage to your 2nd wife after demise of your 1st wife and inform the office accordingly.
7.There may not be any record of who is the mother of your children and even if there is, it does not fall with in the purview of your office as to who gave birth to your children. They will take objection if you marry twice during the pendency of your 1st marriage.
8. You can marry your 2nd wife now and inform your office accordingly attaching the copy of the recent certyificate of your marriage.
9. In the above event, she will be treated as your legally wedded wife and will be entitled to get all your post demise benefits including widow pension.