W2M, I've had to deal with an OW who has been angry, irrational, demanding, etc., but I think yours has mine beat. I've always had this fear that she would go off the deep end but so far has not. Yours definitely has.
It's a tough call about filing a police report. I can emphasize with not filing it -- you're a compassionate person. On the other hand, protecting your family is important, too. But maybe getting the police involved like you did, and letting her know they were involved (and that you could file a report) could be enough to deter her.
All of this is hard as h3ll to deal with but there is one positive thing ... her actions are killing/crucifying any emotions your H has for her. This is what happened for my H and his OW. While she ranted and raved and behaved irrationally, I sat by and was calm, cool and collected. She drove him back into my arms. I know his feelings for her are dead -- in fact, I can say he really dislikes her now.
Not to say that at times, I didn't get angry, I did, but mostly I took a DB approach. During one of her episodes, my H told me I was amazing for putting up with all of this. I knew then that I had taken the right approach.
Hope this helps ... hang in there and let OW do all the work, she pretty much has already.
