Sophie, I hate to break it to you, but....get use to the inlaws acting like they have their heads in the sand. They are hoping that if they don't have to acknowledge the situation, it will go away. Blood is thicker than water and do not expect them to extend themselves to you. They do not want to take sides and are stepping far, far away from this.
Settlement agreement in my state is a separation agreement which specifically states what each party is responsible for and how the property will be divided up if a divorce takes place. I don't know what your state does in the way a separation agreement.
You will need to find a way to go on w/your life. If someone asks about your situation, you can honestly state that he's taking a break from his responsibilities. You don't have to go into detail, nor do you need to pretend that everything is okay. You are going to have days when you feel like heck and do not want to be the happy camper. That's okay. Keep your expectations at zero in all areas and that way you will not be disappointed if something should happen in a good way.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
