Look at it from the another perspective... Do your children make the family's decisions? While you do take your children's wishes into consideration, this was an adult situation, it was an exceedingly stressful time, and you had an adult decision to make. In most circumstances you do let the other adult face consequence for bad or even abusive behavior.
I completely agree and was going to post the same thing. No child wants to see mommy get arrested, but that doesn't mean you don't do the adult thing and protect your family from physical and mental abuse.
I remember almost 20 years ago, I was washing dishes and my wife pushed me out of the way to put a dish in the sink. It made me trip over the dishwasher door and i fell to the ground. Well, I reacted badly by yelling, and she threw a fork at my head. It missed by inches as I dodged it. I started screaming, my wife threw a coffee cup at my head and I dodged it again, it smashed on the wall behind me. Then she threw a bowl at my feet (I was barefoot) and it sent broken pieces everywhere. I said, "You want to break dishes, let's break dishes," and I smashed three or four plates in one big stack into the ground. From there, we yelled for maybe 5 minutes and it was ugly, ugly, ugly. We were both dead wrong.
I bring this up because our daughters were 4 and 6 at the time, and they both vividly remember this argument in their 20's. It terrified them and to this day, my wife still brings it up how I "attacked her for no reason" (I never threw anything at her, only plates into the ground in front of me).
If it happened all over again today, I would call the police if necessary. I hopefully wouldn't react the same today, but it's so hard to remain calm when you're being physically assaulted out of the blue, over nothing. That's not the real issue here though and I've already said that I was dead wrong for my part in that night.
What actually matters is the kids witnessing anything like that- it should never happen regardless of the circumstances. So even if you don't call the police next time, you need to grab the kids and take them to McDonalds for ice cream while mom destroys the house alone.