Child Abuse: My Friend Needs Help

Hi there. This is a very LONG complicated story, hopefully someone can help me help a very good friend of mine.

The basics: She (Nichole) is sixteen, will be seventeen in October.
Her parents divorced years ago, shortly after that, her mother handed over all custodial rights to Nichole's father, whom she lives with.

Her father recently has remarried about six months ago, bringing into the household his new wife, Debra and her two children, one is a nineteen year old boy i'll call J.

J and Nichole developed a good friendship, J was VERY good at playing mind games and convinced Nichole that dating him was "okay" seeing that he is her step brother and that they were "in love". So she believed him. J's mother was all for the idea, Nichole became pregnant with J's child. This prompted Debra to push Nichole and J to marry, which she was VERY persistant about, Nichole was against it. She made them move into a room together and sleep in the same bed. She had a miscarriage and Debra deemed it Nichole's fault for 'killing' her son's child, Nichole believed that is was her fault. Ever since, her situation has gone downhill. J began to control her, she was not permitted to leave her home...at all. If she said a curse word, he smacked her, no, not 'lightly tapped' her, SMACKED her. He belittled her and forced her to get a job, every paycheck of hers, he took and cashed, and gave her a small 'allowance' out of it. His reasoning for this was that she was 'not mature' enough to have money. She worked hard to get her driver's license, he confiscated it, cut it up and refused to allow her to drive. When he got mad, he would push and shove her, and at one time pushed her so hard she flipped over a table in her backyard. All while this was happening, Debra said "it is for your own good, maybe you should mind him better." Her father remained silent and watched it happen, obviously whipped by his new wife. One day Nichole became tired of it and realized that this was not right, she came to me and I counseled her to get out of the relationsip...NOW. Nichole's parents went to Wisconsin for a week and a half and left Nichole, Nichole's sister (19), J (19) and Nichole's step sister (16) alone in the house until they returned. Upon Nichole breaking up with J, he had gone on a RAMPAGE. He called the police and created every lie possible to get her in trouble, the police ended up telling J that he was abusing the legal system and told Nichole that it would be best for her to leave her home until her parents returned from Wisconsin. The police leave and J chased her off the property. She and her 19 year old sister went with me to my home where they were safe. nichole and sis later tried to return to their home to retrieve clothing and other items to last them until their parents returned. They returned to find all the locks changed and they house empty. Nichole calls her father in Wisconsin, where he then explains that he had J change the locks and her, nor her sister were allowed to return to the home until they had come back. So Nichole and her sis were left to fend for themselves, they end up going to their mother (who had given up custody rights). She took her sis in and gave her shelter, Nichole is staying with me. Their father has since returned and flat out said that she is not welcome home anymore, because of the fact the she had 'cheated' on J and hurt his feelings by leaving him. Her father told her to live with her mother. but the catch is that in 10 days, the mother, her husband, his four children as well as Nichole's two sisters are moving in with her Grandmother and Grandfather into a THREE bedroom home because they can't afford rent, Nichole doesn't want to live in a household with 10 people under one roof, so she asked her mother to live with me, she refused. Nichole does not know if her mother legally can tell her what to do, as she gave up her rights, and does not want to get called in as a runaway for living with my fiance and I. She has a full-time job, is doing well in school, has a driver's license and a good head on her shoulders. With all of this said, I am torn because I really don't know what to do, i want to avoid any conflict with her mother as far as taking her in goes, as I am pregnant, due any day now and don't need any legal trouble. Is emancipation possible in her situation? If not, what is there to do for her? J has recently gotten over his rampage and is now constantly calling her playing his mind games once again, i am afraid she is falling for them. She is now considering moving back in to her fathers, her father has agreed to allow her to move in on one term: she begins dating her step-brother again. She does not want this, but she might agree because she has no place to live...legally. ANY suggestions PLEASE. ---Ashley