Dear sir,
I am summing up your issues to make my advice clear to you.
1) whether you can get the divorce on the ground of adultery?
2) whether you can get the custody of the child, where you are currently unemployed?
3) whether you can sue the man for the adultery?
Coming directly to the answers to the issues.
1) Whether you can get the divorce on the ground of adultery?
YES, you can get the divorce on the ground of adultery, subject to the cogent proof you have. Its a ground under section 13(1) of hindu marriage act.
2)whether you can get the custody of the child, where you are currently unemployed?
Maybe, As per the law child below 6 years are to be under the guardianship of the mother. But, we can prove in the court that the lady is such as that the benefit of the child cant be assured. And if the child wants the guardianship can be decreed in your favour.
3)As per the recent judgment of the supreme court which is Joseph shine vs union of india, the adultery law has been strucked down by the supreme court. so you cant sue the person on the charge of adultery. But, we still have many options where he can be held liable.
Hope that solves your query.
YUGANSHU SHARMA
ADVOCATE