I'm hurt that my wife gets away with being selfish
Why do you feel she is selfish?
The reason is because she's the one who has always wanted kids.
You should have a conversation with her if you don't want to have kids before you got married. I don't think it is fair to blame her if you have not been open about your feelings about kids.
You can't talk back to me. You know what, I'm going to get a divorce.
It is normal for people to be open about if they want kids before getting married. If you are truly unhappy it is better to leave instead of harming her or the child.