Throwback Thursday - Private Sins by Janice Kaiser

Janice Kaiser was first published in 1985 and has written at least 32 books, primarily series romances for Harlequin under their Superromance and Temptation lines. Private Sins is a standalone romantic political tale that uses Ms. Kaiser's education as a lawyer in addition to her experience as a romance novelist. Private Sins was her second mass market, standalone, novel, published in 1995.
The novel got good reviews and is given a 4.00 rating on Goodreads. It still reads as contemporary - the private scandals of politicians and other prominent people make the news every day - this novel is a fictionalized account of the stuff of the news.
Private Sins can be had for as little as $3.97, including shipping, on Biblio. 
From the back jacket:
BRETT-the stunning, brilliant attorney tested and tempted beyond reason when she falls in love with her husband's son. AMORY-the new supreme court justice who will put his heart on the line to keep his young wife and his life on the line to defend his beliefs. ELLIOT-a political attache trapped by his contempt for one woman and his forbidden love for his father's new wife. HARRISON-a senator whose scandalous private life may cost him much more than his career. Only by exposing the private sins and secret passions of this very public family can they fulfill a destiny that is theirs for the taking .