You shouldn't have to pay to be a model.
They want you to represent them what you need to do is take some pics of yourself from of your face with no make up...then your profile and then you in a bikini so they have an idea of what your body looks like.
Then you go to different respectable...
When she makes alot of eye contact with you or kisses you deeply.
When you and her share a romantic moment ex. telling eachother" I love you"
When she starts breathing heavy and you check her panties and...