sweetcuties has it right, don't make her a partner, your just asking for headaches !!! I've seen too many of our clients get bit doing the same thing. If you do go ahead with it, make sure you have an airtight contract that spells our everything to the letter, including how many photo's she is required to provide each month to the site, and any thing and everything that the model is expected to do to be considered a partner ! Otherwise you just asking for trouble.
Tim
