Don't encourage her. She's an uninhibited gal.
That said, I got the shit scared out of me by being a bad accident when someone else was driving, and flipped their car with me in it. Had I not had the seatbelt on, I would have been dead. That was enough to scare me straight into making sure I drove well, and while I'm not a "grandma" driver, I'm not a showoff or careless driver. To this day I do not have an accident or a ticket to my name.
That said, I'll echo the sentiments of most here and ask WHY THE FUCK HAVEN'T YOU LEARNED? One accident or one ticket can't scare you, so what will? You're going to have a suspended license by the end of the year at this rate, and you're only what, 18 or so? See that pedal they put next to the gas? It's called a brake...it can be used. Go ahead and pop it's cherry, will ya? If not for your sake, then for the sake of everyone on the road.