Invasion of Alien Women

Carl Sanders picks up an attractive young blond woman in a hotel bar by offering her a drink.  He manages to talk her into having a one-night stand. He has been picking up women for years so this was nothing new.  He doesn't realize that he is now permanently bonded to this woman.  He takes her home, divorces his wife, and marries her.  He is a wealthy man and owns a auto dealership and is the perfect catch for this alien woman.
Taking men away from human women is what these alien women are designed to do.  They go looking for powerful and wealthy men.  Usually these are men that run around on their wives. These men become permanently bonded to the women after having sex with them. These creatures are intelligent, beautiful, social, well liked, happy, thoughtful and calm. They are perfect women in all ways, except for one since they are sterile.  Usually the children go to live with their father and the new wife since they are great at working with children.  The man also prospers and does better than before. This is a science fiction novel that deals with a different type of alien invasion.
These hybrid women are more beautiful, more intelligent, and able to bond men to them.  They divide every six months and reproduce fairly quickly. They use sex to withdraw breeding males from the general population resulting in a reduction of births. Within ten years' time, earth becomes a different place. This is an erotic science fiction romance novel.