Complex sentence: Marion, who takes a chance and gets out of the car, is attacked and raped and, according to Donna, Bev locks the doors and won't let her back in, or let anyone out to help.
Split into simpler sentences: Marion, who takes a chance and gets out of the car, is attacked and raped. According to Donna, Bev locks the doors and won't let Marion back in, or let anyone out to help.