simonzorn

If you didn't Marry within the 90 days at POE then you over with this. Your reasoning should be passed onto in writing to the Mexico USCIS. Yes, she is Out of Status and Illegal. (Maybe Obama will grant her a Green Card as he breaks all the Rules) After you inform them you are out of this picture unless you change your mind later as love makes us sometimes do silly things. No, you cannot Sue her. Wipe your face and walk away. She Cannot Adjust Status under current Law without you and needs to return to her Country. If you do not report her then you are a fool as it will come up if you ever decide to petition another later. Good Luck.

It is 90 days before the expiry date on your conditional green card, or as soon as possible after obtaining a divorce (if done before the window opens). If you file for divorce but it is not complete before the time your window closes, you can apply on your own with a divorce waiver. Once you have the divorce decree, you must supply it to USCIS.
As for the California divorce, if your wife is willing to agree to a divorce, and you have few joint assets and debts, and no children, you can file jointly for a summary dissolution. This is a streamlined version of divorce for people who have been married for fewer than 5 years at the time of separation, and have few joint obligations. It is cheaper and easier than a "regular" divorce. No court appearances are required, and only one $435 fee is required (in a regular divorce, both the petitioner and respondent must pay first appearance fees of $435). It is a clean walkaway, so if she is adamant about alimony, she may not agree. Nola provided the link to the CA courts website on divorce above -- it is very useful. Summary dissolution infor here: http://www.courts.ca.gov/selfhelp-summarydissolution.htm. I've been trying to get the info for you about self-help hours at the various courthouses in LA but the LA Superior Court website is acting up today. Suffice to say that Santa Monica Courthouse keeps regular hours where volunteers can talk you through the divorce process; not sure about the other courthouses. I think it's in Room 210, if I recall correctly, and I believe the hours are in the morning 9-12. There might be some afternoon hours too.
Deal with your family law issues first. The rest will follow.

I wish you the best, I feel bad your going through this but at least you found out sooner than letter and after having children.

Sorry, I like reading people's stories and helping the best I can but I'm not touching this one, why would anyone try to help someone with your moral character stay here? You can go back to the Philippines with all your drama....and stop making it harder for the rest of us.

As somebody above already mentioned - there is HER side of a story. I would be very careful to believe it right away.

Sounds like she just used him for citizenship. Surprise, surprise.