Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.
What year is it?
Do the brake lights come on when the brake pedal is depressed?
Did you check the fuses?
She says that the power locks have been getting slower and slower everytime that she starts the car. Now she says that it is not working at all, and she has been having a tough time getting it to shift. Does that sound like a fuse issue?