I will be using names to stop confusion the names are totally changeable.
Incest: Rose [the sister] Tom [the brother]
Tom has moved into the city from the country side so he can find work and support his family and his sisters education, he has very little or no contact with his family only to send the money or one or two letters a month. One night 4 years later he is coming home late from work Lilly who he had seen last when she was 14 was on his door step in tears a trunk on the floor and a duffel bag and a small panda back pack on her back which he had sent her. Immediately reconsign her he rushed up to her and hugged her wondering why she was crying helping her in he found out what was the cause of her tears. Their parents had died in a car crash while they were driving to get groceries form the store they got stuck in the train track Lilly got out to help her parents but it was too late their Father pushed her out the way to save her life. The only living person she knew was him and she came to him. [Now begins their life together Top finds himself looking at his sister who has now become almost a woman she has a full chest full lips a nice tight end figure. I want the setting to be in Japan but any country is fine]
This one is where the girl is a call girl [or any word you prefer to use]
The Beginning [Veronica the girl, Mathew the client and lover]
In the beginning Veronica knew what sort of life she had chosen. Always she'd had her mind about her and had no never-mind's about it. She'd needed the money and this was the easiest way to get it .Years had passed every morning the same routine she would entered her house and bolted the door, locking it securely. She would undressed and slip into her nightdress which she called her day dress on the account of she mainly worked nights. She would curl up in bed and take the red ribbon out of her hair. Set it on the dressing table she stared at it remembering who had given it to her.
They weren't all that old at the time. Young lovers. Mathew knew what Veronica Mathe did and he accepted it as he was her client one night. Veronica wanted to be all for Mathew and no one else, but circumstances made her change her ways into what she was. He'd given her the ribbon on a picnic, very rare occasion for her seeing as it was during the day. It had stayed in her hair at all times. Holding back the thick curls that he loved to run his hands through. He had promised to take her away from the life she had to lead, promised her a normal life where she could forget everything that she'd done. It hadn't worked heer owner as he called himself had caught wind of her romance with the man and had put a stop to it right away. [I would like this to continue 3 years after them being separated, he was taken away and beaten to a pup and left for dead in the four years he has become quiet rich and now is back he heirs her for the night to come to his private villa in NY (or any city of your choosing) where he has pictures of her on his bed room walls paintings that he done him self [he was a painter also] but he is not there when she comes in he is watching her from out side. Will she remember him will she accept him back, will she still love him like she did before you get to chose that]