4.5+ stars 
 Casey and Nate have been friends for a very long time. Nate is best friends with Casey's brother, and living in New York both as successful business people, their paths have crossed in work and casual capacities. 
 Casey is a strong-willed personality. She is direct and forthright, both in her business and personal relationships. When a long term boyfriend breaks it off with her claiming she's too controlling in the bedroom, she begins to doubt her ability to please a man when she knows exactly what it is she wants in the bedroom. 
 When these two best friends turn their relationship physical so Casey can learn to be more submissive in bed the flames heat up so fast it was hard to believe neither had noticed the mutual attraction before that moment. They are hot, hot, HOT. 
 But they were also immensely playful, both in bed and out. As their relationship started as friends, they have that friendship to fall back on in times when they aren't naked together, and even when they are it is clear that there is mutual attraction and more than just plain "like" between them. 
 Beyond the physical, they each had their own relationship hang-ups to get over before they could fully open their eyes to what was between them. Though their hurdles were different, they each carried pain inflicted by past significant others that clouded their perception of all other romantic relationships. 
 At a fundamental level, Casey is asking Nate to help her change her personality to fit what she thinks is expected of her. I loved the way that whole aspect was handled, as it could easily have been awkward, or lose authenticity as Casey went through her lessons. But Nate (and Lauren) handled Casey's request beautifully and I loved him even more with each passing lesson. 
 Set within the world of Lauren's Seductive Nights and Caught Up In Her series, many of the side characters are beloved friends and family members that readers of the series will recognize and appreciate. 
 This book was hot, hot, hot, and fun. I loved every moment of their friendship, their physical side, and the deeper emotions that ran underneath everything they did with each other. 
 I was gifted a copy in exchange for an honest review.