Conditions for the validity of Nikaah

Q: I am thinking about marrying a woman who has a son already from a different person who is a sikh. I know its not allowed to marry someone out of religion. But the person who was married to her converted to Islam and did nikah but after couple of years he turned back to sikhism. Now the problem is where she stands at the moment. And she is also not divorced by him too. So can I still do nikah with her because its also not allowed to do nikah on top of the nikah as I know according to Islamic point of view. Moreover she is older than me almost 17 years but my intention is only to ease her problems and give her a happy life. Your advise will also help me a lot in this matter.

Q: Is there any Shar'i reason regarding nikah between a tablighi female and sunni male? Bear in mind the two are divorced with kids and feel they are suitable, but both are hanafi. No bidat involved only salaami on Thursday nights.

Q: After married to a second husband for 20 years, the wife declares that she is no longer married to the 2nd husband because she was never divorced from the first. The 1st husband reclaims his wife. In the 1st marriage, no talaq was mentioned. The husband just stayed away from the husband. Is this allow in sharia and was the second marriage valid. What's the ruling on this?

Q: I want to ask that if I can do marriage with younger sister of my wife, I mean second marriage. Islam allowed to do so or not please guide me in detail.

Q:

1. If a guy proposed for a girl, will it be consider as nikaah?
2. If a girl is proposed for by a guy then what should the girl say to him (as per islamic opinion)?

Q: I want to ask a question and want fatwa. I am a psychiatric patient suffering from serious mental illness under treatment of a qualified doctor. The disease can be controlled but can't be finished. Also I had a blood disease thalesimia minor, which if my wife/partner also has (which is not tested yet), can cause to give birth to a baby with serious blood disease. I knew that before marriage and my physician told me that where you want to get married to take blood tests of the girl you want to get married to. We did not tell and hide where I was engaged my serious mental illness and blood disease which is minor. Now my wife and her family knows my mental disease because of my behaviour and medicines which I use not blood disease and she has give me a chance of few months to improve my self. If she see improvements she will decide to continue marriage with me or not. I am trying to improve my self. Is Nikaah Halaal and as we hid my mental and blood disease from my wife and her mother before marriage?

Q: Are the Jews and Christian of today still considered to be Ahle Kitaab. Especially the Christians, can one get married to them even though they do not accept Islam on the basis that they are Ahle Kitaab? 

Q: I married a sister about 18 months ago. She had a contract in which I signed that stated I cannot have another wife for five years. Due to unavoidable circumstances I married another wife. Is my first nikkah still valid?

Q: I am a sunni girl Alhamdulillah. Fortunately or unfortunately I like a shiaa boy. For a long time I was unaware about the major differences between shiaa sunni. Now when I have come to know I am confused ....very confused. We both have already committed to each other about getting married. Now Sir ... I want your help. Can you please tell me is it not halal for a sunni to marry a shiaa? And what is the reason if it is haraam? After all Shiaa's do also believe in Allah and read the same kalima. Awaiting your answer.

Q: Can a woman's nikaah be performed during her menses?