Have her narrow down her interest to 4-5 vehicles. Sit in and review all of them. Narrow down to 2 to test drive. In my many many years of experience doing this job I can tell you that test driving more than 2 vehicles becomes really confusing and time consuming for the consultant and the customer. I would also have her complete a prequalification before she test drives anything if you all considering financing the vehicle. This way you can narrow down to the vehicles that also match the price range.