If my experience is at all similar to yours, she definitely wants to file and is trying to completely justify in her mind that your marriage is over and it’s your fault. That will give her the strength to do what she knows is wrong. My wife demonized me in her mind so that she could justify filing, on Valentine’s Day, and also live with the fact that she had stepped outside of our marrige and broken her vow to God and me. Overnight I became an abusive husband, despite the fact that there is no evidence at all of this. I loved my wife dearly, and cherished her as a blessing from God.
Pray for strength, and know that it is going to get worse before it’s better. As someone said to me, stay on the high road, but don’t give in on anything that is important to you because you feel sorry for her or still have feelings. You will be manipulated and you will lose. No human being knows you better than your wife. This includes your weaknesses, your vulnerabilities and how she can best manipulate you for her gain. I say this from experience, not just my own opinion.