It's a difficult situation.
TMI time: I was dating a girl who was undiagnosed bipolar or something thereof. Once she went manic, and went for the knives in the apartment. I had to physically restrain her. Luckily, she was short, so I just put the knives in a high cupboard. It was still a situation where I had think about legions of abusive males while staring at a knife in my face.