I am 6 months pregnant, my SO has three children. His 7 year old son has extreme behaviors and is on medication. Within the last few weeks he has hit me on three separate occasions, he has no remorse and I know it will happen again. We’ve struggled with the idea of a mental health hold as he has also made threats to hurt himself and others, and this aggressive behavior seems to be getting worse. We have shared, week on/week off custody and the transitions are very difficult. After he hit me again this morning, punching me with a closed fist in the back/abdominal area I told him the next time he hits me I will call the cops as he could injure our unborn child and myself. I’m not sure what good this would do but I am at a loss.