Let's look at the facts:
1.) She dooesn't want you in her life or the babies life, one jot.
2.) she obviously is ' suffering ' minimal contact with you because she is shit scared you'll grass her up.
3.) She has chosen her husband over you.
Good luck in trying to obtain any parental rights because you won't get jack shit. Many, many legitimate and loving father's who are separated or divorced can't get access to their children, for love or money, when the relationship breaks down and turns nasty.
And we can hardly put you in the ' legitimate and loving father category ' can we !?
I agree with Animation that letting a man unknowingly bring up another's mans child is a shitty thing to do, and that his wife should come clean, but it's certainly not your job to tell him.
Being a father isn't just about biology, it's about ' being there ', making sacrifices for the child, putting the hours in at work to give your family the best start in life and conversely, spending quality time with the baby, providing a safe, warm secure environment.
Maybe she feels her husband can and will provide that !? After the way you ( And her have shit on HIM ), don't you think in his ignorant bliss, he deserves that chance !?
Say, you tell him, do you seriously think she will come running to you !?
She can see from your pressing actions, you have neither her welfare or the babies welfare in mind, certainly in her mind, anyway....
Op, sorry, but you do come across as an immature meme meme meme meme.....
Put some time, space and distance between you and her and see what develops.