My sister got married to our cousin last year. They had made lots of promises out of which they fulfilled none. On top of that they are torturing her there. Now she is pregnant and in spite of that, no one is taking care of her, not even her husband. No one took her to the doctor. They don't even give her food and ask her to buy on her own from the market from her own money. Now she wants to go back to her parent's house for pregnancy, no one is allowing her. Her medical condition is worsening day by day. Can she ask her father to come and take her back, even if her husband isn't allowing? She isn't in a state to live there as of now.

Yes she can ask if these are the conditions but sometimes we commit a halal and permitted options which contains or followed by bad social consequences