I think it's totally fair that you send her the bill for repairs... I put a nice hole in my oil pan that was about 1/8 the size of that one by going over a speed bump way too fast. I was being totally reckless when I did that. To see the size of that hole, I don't even want to know how fast she was going, nor what she hit.
You loaned her the car predicated on trust. You trusted her to take good care of the car, and she didn't. She took it off-road and was obviously driving way too fast.
I am no expert mechanic, but if the engine starts sputtering and dying, it's usually toast. As the guys have said, the only way you will know is to get a new pan, fill it up, and give it a run. Good luck with that... Hope her Daddy has a thick wallet.
1987 BMW 325e
2 Door, 5 Speed
Current Mods: Bilstein Struts, Eibach Springs, AC Schnitzer Type I Rims, S&K Short Shift, Momo Steering Wheel, AC Schnitzer Interior Accessories, Recaro Leather Seats, Cross-Drilled Fronts/Rears, BavAuto Performance Headers, Dinan Free Flow Exhaust.
In The Works: BMP Design Chip (on order), BMP High Flow Filter, E-I Conversion.