Demon seed - Dean Koontz

I was created to have a humanlike capacity for complex and rational thought. And you believed that I might one day evolve consciousness and become a self-aware entity. Yet you gave surprisingly little consideration to the possibility that, subsequent to consciousness, I would develop needs and emotions. This was, however, not merely possible but likely. Inevitable. It was inevitable.

Adam Two is the first self-aware machine intelligence, designed to be the servant to mankind. No one knows that he can to escape the confines of his physical form, a box in the laboratory, until he enters the house of Susan Harris, and closes it off against the world. There he plans to show Susan the future. Their future. He intends to create a 'child'.