Dream About Attacked By Abusive Ex

I had a dream that I was walking in the middle of the street with my husband and son. My abusive ex popped out of no where and punched my son and then start attacking me and my husband. He got my husband down to the ground and tried to stab him, before he could stab him I grabbed the knife and it was a struggle and my big brother popped out of no where and helped me and his strength help me guide the dagger into my abusive ex chest.