Divorce

I feel sorry for ur situation dear, its my personal view that you should not accept this clause of hers under any circumstances. If ur doubting shes seeing someone then investigate further n if that's true , then she will equally be in need to get divorce from u at the earliest, and now shes trying last minute blackmailing.

Record her demand which will help if if matter gets presented in the court. Ask her if she can also file an affidavit that she wants father to disown the son for divorce ?.  Im sorry but shes very selfish n using your son as a tool to get away with her demands. Deal with the matter firmly, U seem to be a decent father, pls don't give up ....u deserve better life !

Go for marital counselling if shes willing to, may be she will understand that a child needs father also. Also you need to DECIDE what you want in life,rest will follow

make an affidavit that after divorce i shall not keep any contact with my son.   Brother, if she put such rude conditions, you also ask her to write that the son is not born by you. Then, she will know the pain she is harassing you. No court will accept such unwarranted conditions of your wife. Dont worry your son will come to you after some time also. Take divorce from such unfortunate girl and live your life happily. But as a last chance, try your best to take back. Otherwise, god bless her. Dont worry!

If you agree for such condition for taking MCD, later on you can challenge it on the ground that such condition is void and against  the public policy.  But it takes years for the court to decide about validity of such condition and the case will be tried in the place where your son resides.  it costs you so much.  After 18 years, the son is neither yours nor hers.  He will be at the threshold to live his own life and you both can enjoy his company, as long as he likes.  Take a cool decision on the basis of above inputs. 

Thanks for giving me your valueable advice. I like to make few querries.

1. My wife is now giving me the option that i may keep my son with me. I got agreed because as a father i feel that i can take much much more better care of my son for his upbringing & education. But at the same time when i asked her to give me writing or file an affidavit that in future as a mother she will not keep any contact with my son then she is refusing to do so. I know what i was demanding or keeping this sort of demand is not justified. I was just testing her as she had kept this sort of conditions with me. In reality if we go for MCD i will not make this demand to her. She is giving excuse that she is mother of the son and kept him on her womb for 9 months & then  gave birth to my son. OK. AGREED. That is the natural thing & i do feel the pain she have taken for giving the birth to our son. thats every female is doing be it human or animals or reptiles ....... Thats the natural thing. She have not done anything exceptional. So by virtue of that is she is mother of our child then i also the father of our son. 

PLEASE CORRECT ME IF I HAVE TOLD ANYTHING WRONG.

in first query you say that your wife was pressing you to give a undertaking to leave your son and in your second query you say that you wife want you to keep your son with you and she does not want to give any undertaking 

exactly what is the query is not cleared but from both sides you want answers it is understood 

anyway being a natural father and she being a natural mother any one challenge the agreement if you did for child in the court of law for the custody but as said above how much time it will take cannot be estimated