Learning Curve — Diana Hunter

As a young girl, Sam fancied herself a writer. Excited, she showed her first story to a classmate, who labeled it "yucky" because Sam's female protagonists had been tied up when they were captured by the bad guys. Abashed, Sam spent the next decade caging her vivid fantasies of being tied up, and cultivating the good girl image that society expected.
Until she met Peter. Sam didn't understand why her body responded so violently to his kiss, only that when it did, her fantasies banged at the bars of their cage and threatened to break free.
The night they finally escaped, Sam's life changed forever.
(This is a re-release; previously published by Ellora's Cave Publishing, Inc.)