(which is exactly why she wants to catch her by surprise) Since jenny was already in the perfect position, and Jon seemed lost in pleasuring Jenny,  Diana decided this was the perfect time. She braces her feet, grabs Jenny's arms together in one hand, pushes Jenny's head inside with the other, and concentrates on changing. Unlike the movies, the transformation isn't nearly as slow or dramatic. In fact, if you had blinked, or had your head stuffed into her pussy, you would have missed the change entirely. Jenny would now not only notice the change in scenery, but also the size of the paws that  had grabbed her were covered in fur, and doubled in size