"Can I just have all the JPEG photos from the session and edit them?"
There is a certain level of trust that must be maintained between a photographer and their clients. Were I to release my full, unedited session, I would risk damage to my reputation. I am being paid to provide my skills and my vision. I also take far more photos than are needed to reduce loss of a moment due to human/camera errors such as camera shake, focus errors, blinking and similar issues. I then narrow down these images to provide only the best of the session. Trust me, it's not as easy as it sounds, but it is my job to ensure that only the best are selected for editing. Once I release purchased digital files, there is no real way to stop a client from editing, but please realize that any changes to my work wastes your money and hours of my time editing. Please respect my work!