My sister..... how screwed are both parties?
Your sister is responsible. They could go after her if her insurance doesn't cover it.
Depends on the sis's insurance.
Obligatory: Pics of sis. Smartphone excuse not valid.
Yes. If you give permissive use of your vehicle to someone that you know is not licensed to drive you are responsible for the damages caused by said driver/vehicle.
Yes. If you give permissive use of your vehicle to someone that you know is not licensed to drive you are responsible for the damages caused by said driver/vehicle.
Who ever owns the insurance policy on the car is the one ultimately responsible for the payout. Your sister will have to pay. Her rates will likely go up. Hopefully she forces this Eurotrash moron to pay the deductible.
This is why you should never lend someone your car. Make them pay for a rental.
According to who? You? Certainly not the court.
Someone may sue you in civil court but you can be sued for anything, that doesn't mean you're going to lose and it sure doesn't mean you are responsible. The person who commits the act is responsible, period.