Replying to Anyone fix a big dent in their car? Whats it $$$$??

So as I was moving from school to back home, I had my suv packed so full I couldnt see out the back, and some girl was parked perpendicular to me, by my house.  I backed out and her car stopped mine, so it wasnt a light impact.  I kinda ruined her mirror, which probably needs to be replaced, but what I'm kind of worried about is the big dent in her side door.  It's about 6 inchs by 6 inchs, not that deep, and a chip of paint missing.  So am I going to pay out the ass for that dent?  Or can they use those suction cup things and pop the dent out?  All I did to my car was break the tail light cover, and a dent in the bumper.