I'm trying to find a story where the MC is a photographer who meets (is neighbours with?) a young woman who has a soft porn web site where she is shown with stuffed cuddly toys.
They start a relationship and later go to visit her father, and the MC discovers that she has an incestuous relationship with her father.
I think they also do some investigation into his parents or grandparents, and it turns out that they have a three way relationship that includes a coloured man