Demon Seed - Dean Kootz

Susan Harris lived in self-imposed seclusion, in a mansion featuring numerous automated systems controlled by a state-of-the-art computer. Every comfort was provided, and in this often unsafe world of ours, her security was absolute.
But now her security system has been breached, her sanctuary from the outside world violated by an insidious artificial intelligence, which has taken control of her house.In the privacy of her own home, and against her will, Susan will experience an inconceivable act of terror. She will become the object of the ultimate computer's consuming obsession: to learn everything there is to know about the flesh