Lynne does not want us to read about the lesbian affair. Not her own of course, the one from her fictional romance novel
Sisters, published in 1981 that also featured other racy scenes.
It's unsurprising that she wishes to suppress its publication. A single phone call from her lawyer, who claimed he threatened no legal action, (as if he would need to), caused the publisher to cancel the planned reissue of the bodice ripper, even though they owned the legal rights.
While it's hypocritical, I think it's okay for her to have made money from exploiting the prurient tastes of the public while presenting herself as a moral conservative. However, it's wrong to use the power of her husband's office to abridge the publisher's right to make a profit and the public's right to have easy access to the work of a potential First Lady --simply to preserve her chaste facade in an election year.