Now and forever - Danielle Steel

Although Jessica and Ian Clarke have been married
seven years, they insist the thrill and excitement
haven't dimmed. At Jessica's urging, Ian has quit
his advertising job to become a struggling writer,
and she supports him with her successful San
Francisco boutique.

Ian's financial
dependence on Jessica upsets him more than he admits, and
in a moment of bored malaise, Ian's first casual
indiscretion will create a nightmare that
threatens everything Jessica and Ian have carefully
built. What he does changes their lives, and them,
perhaps forever, as they struggle to pay the price
of his foolhardy affair.