I'm very sorry to hear that, hope they heal well and fast.
It's shocking that someone could be involved in a hit & run and cause that kind of damage without stopping.
Last month my wife was hit from behind on I-80 in NJ. She was unharmed and the car was driveable, but it was later totalled by insurance.
The other driver never stopped, and no one on that crowded road called it in. My wife was lucky it didn't turn into a NASCAR-type wreck.
Best wishes to Thom & Nina.