Pregnancy dilhema, what should he do?

This is a situation that is going on with my cousin. What would you do in the situation:

Your girlfriend got pregnant while on the birth control pill. It was a shock, but you accept it, and eventually are happy about the situation. Your child is born,...

you love him more than life itself. You and your girlfriend love each other, you have your problems, but you are still in love and still together.
One day, you find out that she lied, she was not taking her birth control, and got pregnant on purpose, without telling you.
Would you be mad? Would you leave her? Would it change your feelings towards your son? How would you feel? Would you forgive her?

thats pretty harsh I dont know what I would do if I was a guy

If it were me, and if I were a man then I would be PISSED. I mean, that could have potentially messed everything up. I would not have different feeling toward my child though. I dont know about leaving her. I think that all problems can be worked through, even this one.
She was wrong in what she did. If she wanted a child she should have talked to him about it first and they should have made that choice. I think all things can be and should be forgiven with time. He is going to have a hard time trusting her now, and that is normal and a rational reaction.
I wish them luck.

its not the childs fault , what id do is leave her but still see the child.

Yes I would be upset, I would feel used and loose a lot of trust in the relationship...what else has she lied about? I hope he doesn't start asking if the child is his.
That was very inmature of her to do that. I wonder if she did it because she wanted a child or because she just wanted to keep him around?...Regardless thats messed up!
However it would not change my feelings for my child and with some patience and over time I could forgive her.

Good luck to them.

Yea, I feel bad for him. He loves her, he just doesn't know if he can trust her anymore. That's a huge thing to lie about. He loves his son no matter what though. He's just confused on how to handle things with her right now.

I say forgive her because the baby is already here, what she did was very wrong but you can't change time, what's done is done. He should look forward to what the future holds with his little blessing...It may be hard you know trying to trust her again and all but life is full of challenges and for the sake of the baby they should work things out.

I think I'd leave her.

I'd be very disappointed at the lack of honesty - essential for any successful relationship - but could forgive, because you said he loves her - so would not leave her - personally I'd want to solidify the relationship via marriage, getting financially stable and providing that little one with a first-class home - certainly the little one is totally innocent, of course feelings would not change towards the son.

personally I'd want to solidify the relationship via marriage, getting financially stable and providing that little one with a first-class home

Just to let you know, my cousin is a new-age kind of person. Him and his girlfriend to not believe in Marriage. They are financially stable and do have a loving home together. They are both done with college and have jobs and have money.

Not the kids fault, but what the hell was she thinking?
Maybe if he got to the bottom of that? If she had a reasonable explanation it would be one thing... if she wanted to trick him, I dont think I would be able to get past that...