I assume you are the "Jessica C" whom we went through all the drama of your divorce with several months ago when you're kids wanted to stay with your ex and then your daughter wanted to live with you, then she wanted to go back.
I guess I missed the part where you thought you were pregnant.
J., I'm sorry, but I have to agree with ALL of the posts from the many, many days in succession - I just hate to see you get into another marriage when you have so much baggage to drag along. Your MIL hates you, your children hate you, your ex hates you - or not - (and yet you were posting that you still had feelings for him). Now you're putting down his ex-wife or girlfriend or somebody (sorry, I've gotten lost in all of these characters) because she likes girls now .... what difference does that make to YOU?
I think you have a LOT of issues that you need to work on BEFORE you get involved in another marriage. Getting into relationships is NOT going to solve your problems. You seem very immature and angry.
I'm not saying to ignore your kids. You will always be their mother, but it sounds like they have not had very healthy role models in their short lives. Maybe it's because YOU didn't have any healthy role models. You have to break the chain of anger and violence at some point.
I would advise you to put everything on hold (that doesn't mean you can't still live with this guy) whether you're pregnant or not and get some help. You seem to just keep 'tromping' through people's lives with the attitude that, 'by God, I'm going to do this MY way no matter what you think.' And that, my dear, will get you NOWHERE!
In another 6 months you'll be posting that this marriage isn't working out - for whatever reasons - and asking for advice on what to do....and you may have another kid by then too. Tell me, THEN, who suffers? You've brought another life into this world who will be just as dysfunctional as you and your children are.
PLEASE slow down - get some help - learn some anger management - learn how to love and be kind and thoughtful.
You will gain nothing by putting down your family, your ex, your kids, your MIL-to-be.....you can't always blame everything on somebody else. At some point, you have to look in the mirror and face the realization: maybe it's ME.
This is NOT to say that you're a bad person. I'm sure you are - somewhere down inside - a wonderful, loving, caring person. I think you've got lost inside and, perhaps for the sake of survival, have become angry and bitter and use this as a defense mechanism to justify whatever seems to be your latest passion.
You are asking for our thoughts and advice and after reading all of the others, I hope you will act on some of it. But, my gut feeling is that you probably won't. Why? Because I have been there and done that - all of it and I had to hit bottom and lose everything before I realized it was I who needed help!
Good luck.