those people with whom nikaah is permissible

Q: I want to know nikaah to your own zania is allowed or not. Actually we committed zina several times and now we are husband wife. Is she halal for me now or not? Also we have one kid.

Q: I once read somewhere that boys have an option to marry Christian girls. Is it true?

Q: I fell in love with a girl who used to be my brother's ex girlfriend for three years. Can I marry her? Now she is deeply in love with me and she regrets her past.

Q: Is marriage with mother's uncle's daughter permissible or not?

Q: Mai aik larki se shaadi karna chahta hn. Hamary ghar waly taqreeban raza mand hain is rishtay par. Masla ye hai k mjy larki sy pta chala hai k wo maa nhi ban sakti. Mery yaha par do sawal hain:

1. Kya ye baat sahi hai k mai ghar walo sy ye baat chupaun aur unhy naa bataun jb k mjy ye baat qabool hai.

2. Kya kisi larki sy rishta is wja sy khatm kr daina k wo maa nhi ban sakti, drust hai. Kya kahi is wja sy mai gunahgar to nhi ho jata. Mera ye masla hall farma dijiya. Allah apko jaza dy.

Q: I know a Muslim female who married a non-Muslim and now she has a 15 years old son. Now she wants to marry a Muslim. What about the son? If she wants him to be a Muslim and he does not accept then, what's the ruling in Islam. Also is it permissible to marry a woman who can't give birth to a child? If she did not marry a Muslim, there is a great danger to her Imaan. Can I marry her even if she is 15 years older than me? Please guide me in this regard.

Q: If a man is going to sleep and only thinking lustfully about a woman and gets an erection, can he marry the woman's daughter?