Scared Till Death Coz Of Sil

i have been telling DH to make sil stay away from me. But he didn't listened. We will have some milestones fights after every few days. Yesterday also we had one. Yesterday's fight was different. SIL started getting physical with me. M scared what will happen. DH is gona keep her away but she is upset by that fact and her parents too. I am afraid that if his parents come they will kill me. I told my parents. My parents again are damn worried. My parents has warned me not to leave home from there. Stay there.
SIL is jobless on opt. She is still staying without sponsorship. DH not ready to send her back. M telling DH that either send her or let me go.