I usually find four shoots with the same model is probably enough. It has nothing to do with the model, but 30+ sets done and they start to look the same.
There are exceptions and Kiana is one of them. I don't think I will ever tire of shooting her, even in a couple of years, when she turns 30.
Today was shoot 5 and as usual we had a lot of fun. Next two shoots booked or at least discussed and we still have ideas to fulfil.