You loan your car, you loan your insurance. She will fall under the definition of an insured because she drove with your permission. You can give permission on a car in your spouse's name. You report this to your insurance company because the insurance follows the car, not the driver. They will ask for all of your friend's info - name, address, phone # & possibly her insurance info. It is possible if your limits become exhausted, your friend's liability can become secondary.
There was a police report so therefore the other drivers information will be on it. Your insurance company will get a copy of the police report & contact the other driver. They will also probably need a statement from your friend so they will contact her too.