Coercion and an amount of force used in making love has been an element in at least one other Lindsey book, I have read (Fires of Winter), and when used with strong character description and plot it can be a spicy dimension in a romantic fantasy. This early Lindsey novel, however, only manages to paint a revolting picture of rape as something women have to accept to be loved.
We are presented with a man who repeatedly rapes the woman he has captured and then blames her for resisting and therefore not enjoying it. Rather than offering support and comfort, the woman's own mother and her nanny recommend she get used to being raped and also suggest she should accept it as a fact of life and let the man get on with it. The theory put forward by both women and men is that it is only "rape" if the woman resists and is beaten while trying to avoid sexual intercourse. If she is threatened into submission it is "making love".
You do not have to be a rape victim to see the distinction!