I've read the reviews and everything I felt has already been said so I will share this instead.
This entire book is about love. The author has set the scene. She has negotiated the terms asking if 'you need to feel the bite.' Agreeing to the scene by reading this book guarantees that you will. You can trust Mistress to control the scene guiding you carefully lest you feel overwhelmed and need your safe word.
Afterward she cares and comforts you until your strength has returned and the pain has receded. You still feel the ache, just enough to remind you of how much she cares for you and wants you to experience love. Love that doesn't quit because of adversity, personal choices, lack of comfort, or even death.