I am a lawyer with over 15 years experience I will help you with this.
If you could give me some more information I will be able to help you more effectively. When did his happen? Has your ex daughter in law been arrested and/or charged with assaulting you? Is she on bail with conditions to keep away from you? Have you made a statement to the police? Were you injured when she assaulted you? How many times has she assaulted you? Has she made any threats or harassed you? What is your income?