Those women with whom nikaah is permissible

Q: If a girl calls a boy brother and the same boy calls the girl sister again and again in a conversation, can they later marry one another or not?

Q: Can I marry my paternal uncle's son? His paternal grandfather and my paternal grandfather are full brothers. His father is elder to my father and is my paternal uncle. Is this marriage acceptable according to Islam?

Q: I want to know a fatwa on zina. If a girl do zina once in her life before engagement with someone else and seeks forgiveness from Allah and after sometime she got engaged with a person who did not do zina in his entire life and the girl tells her fiance that she did zina mistakenly. Now she seeks forgiveness since she did this sin. What is the order of shariah about this? Is the nikah halal or haram with that girl?

Q: My question is regarding marrying a girl that has been adopted at the age of 5 days but the girl doesn't know about her real father. All the documents supporting her parentage is of her adopted father. So please let me know what Shariah says about marrying her?

Q: I got into a debate with a person who has quoted from the Quraan about the topic on fornication. She stated that according to her understanding of the verses, a fornicator, even if they have repented cannot marry a pure person and if they do then the nikkah will not be valid. I debated that Allah Ta'ala forgives the sincere repenter so how can they be punished if they go on to marry a virgin etc. Please shed some light, was I right in my reply?

Q: If my brother died, can I marry his wife?

Q: I have a step brother from my father's second wife and he has a daughter same age as me. Am I allowed to marry her? Her mother (my step brother's wife) is my uncle's wife's sister.

Q:

1. I know that if someone touches his mother with lust, it will break his parents marriage. I want to know if it is permissible for his (the one who touched his mother with lust) children/grandchildren to marry his brother's/sister's children/grandchildren? Are their children/grandchildren allowed to marry each other?

2. Can he (the one who touched his mother with lust) marry his mother's brother's daughter?

3. If the thought comes to mind that a perosn touched his mother with lust during his childhood, but he is in doubt whether he touched or not. What should he do now?

Q: I am planning on marrying a woman. But recently she told me she had sex and she has never been married. Islamically is it permissible for me to marry her?

Q: I'm a 26 year old Muslim man. I committed zina multiple times with a Hindu female friend after which I felt guilty and asked Allah for forgiveness. I stayed away from zina after that.

Now my parents are searching for a good and practicising Muslim girl for my marriage but I am not sure whether it is halaal for me to marry a good and chaste Muslim woman, as I have read that a zaani marries a zaaniya or a mushrikah. Please tell me what to do.