Jimo, brother, I know where you stand. Plain and simple, she sucker punched you! Get up, shake it off, and let her have it! You ain't a dummy, you know what is up. If what you are telling us here is true, the cards are all in your hands.
Earlier in the posts, someone mentioned common law marriage. Most states do not acknowledge those any more. The house is in your name, that's that. Make sure you got your stuff together, such as car keys and personal belongings, credit cards, bank info, debit cards. She may swipe something. Remove her from any and all accounts that she may be an authorized user on.
Now, you want to be nice, right? Perfect. Tell her you guys have been having some issues and it's better that you live apart for a little bit, just to "sort things out". If you got to pay her security deposit and first months rent, be it. It's still cheaper than a few pregoo OBGYN visits. Now, change you locks! Re-program your security codes. For a months or so, keep taking her stuff to her place. Meanwhile, talk as little as possible to her. If you want to be nice, pay her rent for a few months, but no auto withdrawals or anything! After about 3 months or so, stop calling or talking to her! She is out of your life!
Here is how I feel, some things are assumed, but you will get a general idea: (girls on this site, try not to read this, it may be harsh...)
Now, I am pissed at this GF of yours. Just freaking pissed. What right does she freaking have to intimidate YOU like that? Who the fuck is she? You are just there to keep her as a companion and use her for sex? WHAT? Fucking bitch! No fucking way! You busted your ass for 4 years, giving her everything SHE WANTED! She lived in your place for nothing! If you just wanted sex, hookers are much cheaper! And hookers do not ask for babies!
I am so fucking pissed, if I was living anywhere near you, I would have screamed at this bitch! Cunt of a person she is! If this hoe is willing to give up a man like yourself, she is a spoiled, rotten, selfish, entitlement minded, lazy, useless, worthless pile of baybee shit and vomit! She has no idea what work is, because you did it all! She has never appreciated you, you are her work mule! You deserve way better! She has absolutely no freaking right to enslave you into parenting. You will pay, you will provide. Do you think she is going to be happy with you if you give her what she wants? Fuck no! No fucking way! Next time she does not get something her way, it's going to be the same shit, all over but worse. She will have a sprog you will have to provide for BY LAW! The nice things you may have in your house: GONE! The nice clean car you got: GONE, trashed with baybee food. You are in a good spot right now, stay there!
When the bitch is gone, she will be sorry to you many. many times over! You, my man, will have every girl in town knocking on your door. You got cash and you ain't got a sprog. Chicks will not let up. Do not ever think that there might not be anyone else after she leaves! There is much more fish in the sea! Much more!
Cut her loose, she deserves a pile of crap man who lives off of her instead. 5 years from now, she will tell you that you were the smart one. If she has criblets, she will be screwed! Who is going to pay her medical when you are not around! She will eat shit, many, many times! You do not need her, because you can have much better any day!
Do not worry about right or wrong! Some will say that you should say that you do not want kids from the get go! Fine, but women lie, all the time they lie. I have known many females that "hated" kids. Well, they have their own to hate now! Do not attempt to borrow a kid and think it will work. It will not. She will just say that her kids will be different and continue to brainwash you!
People split up all the time. Your GF is a good example of a pushy cunt. Yeah, right now it's the kid that she wants, later, it will be a bigger house or another kid. She has no right to threaten the relationship if she does not get what she wants. You may want a blow job every time she is on her period, but do you get it? I bet not, and you are not kicking her out do you? I bet not!
Cunts like her need to live alone and provide for themselves before they appreciate anyone. She is worse than a fat cat (there is a way to get along with those) and she will not learn anything being around you!