It starts out with this woman driving who is lonely and wants a "magic man."
She meets an alien prince who is hiding out with his personal bodyguard. They've come to earth in the middle of a war on their home planet. He calls the bodyguard a thorn in his side. The alien prince and the woman fall in love.
The alien prince leaves behind the human woman, who has a son in his absence.
Aliens return to earth to take the son. The prince sends a message to the woman that makes her disappear on the spot. (I think she was taken to be with the alien prince, who didn't know he had a son).
So the son is left behind on Earth to fight off hybrids who are trying to kill him. The novel ends with him escaping on a motorcycle.
I remember a great deal of the story but not what it was called. Does anyone here know? Thanks.