Well I’m assuming your over 18 , it is illegal for her to take your disability money.. unless there is a court order.

Are you seeing a psychiatrist and T ? You can ask both of them what options and opportunity’s are to safely get you out of that situation. Can get you a caseworker or social worker to help you

Many people get into a roommate situation. A social worker could be very helpful for you finding a good place for you.

Is your disability deposited into her bank acct or do you have your own acct ?!?

You need your own bank account that her nor any other family has access too.

I do know there are reasons that social security can make an immediate change in which account that your disability monies go into a different acct.

If you truly want to kill your family you need immediately help. Often going into the hospital is the best way to get things set up so that you can fully get out of this situation

Stay safe