Those women with whom nikaah is not permissible

Q: My mum got married to my dad when she was very young. I was a result of that marriage that didn't last. After few years my she married a man that became my dad in every way. I got married and had kids my wife is a cancer patient and gave me permission to mary again. On the night of my walimah I found out that my dad got married again after my mum and had 2 kids a boy and a girl. He got divorced again and married another woman from whom he had a daughter who happens to be my second wife. We already consummated our marriage. I am so confused.

Q: My question is if a non Muslim girl accepts Islam then will marrying her be accepted in Islam?

Q: If a hindu girl is ready to convert to Islam just to marry a muslim boy she loves, is it ok to marry her?

Q: Can you get married to a Christian or Jewish woman? What are the Islamic laws in regard to marrying a Christian or Jewish woman?

Q: Can I pray for a non-muslim guy to accept Islam. I want to get married to that guy if he accepts Islam.

Q: Can someone marry his sister in law (sali) at same time while he is already married to her sister? I mean can I marry my sister in law (Sali) without leaving my wife?

Q: A boy who was baaligh, touched a woman. the boy was full of lust but the woman was fast asleep. he touched her over her clothes. She did not wake up. A number of years have past. This boy now desires to marry the daughter of this woman. Is this allowed in islam. Can the boy marry this girl?

Q: A person has been married since 16 years and has three daughters( 14, 12, 7 yrs) and a son (3yrs). One or two year before marriage his mother in law was intimating him after that they( he and his mother in law) had sexual contact but not intercourse (dukhool). After the marriage they did not have that type of relation. Yesterday he heard from some source that her daughter was haram for him, so his marriage is not valid with her daughter. In that case children are also not halal with him and his wife. He loves his family very much. At the time of marriage he did not know her daughter will be haram for this action. He is very ashamed for his action since that time till now and asked forgiveness from Allah. Now he is very much worried about his wife and children. His wife did not know about that. We live here alone, where she will go. It will be very difficult for my daughters and son to survive with separated parents. My question is, his marriage is valid or not. If not what can he do to save six lives (any kuffara). May Allah reward you here and hereafter for helping his children, wife and himself. I will wait for your answer.

Q: I am a 28 year old female and I  feel I am ready to complete half of my imaan. I recently received a proposal from a compatible partner whom I am inclined to and vice versa. he has also met with my parents and forwarded his proposal but when my dad learnt that  he is a shia (imami) muslim my dad has silently rejected the proposal. My dad promised that  he would get back to him with his answer but it's been almost a month now and  when I approached my dad wanting to know what he has decided and as to whether the boys parents could meet with my parents his response was that I must not rush him and he will give me an answer when he is ready.  A similar incident happend when I was younger and my father failed to respond to my proposal. I don't think this is fair on both of us as we are ready for marriage and want to do things the correct Islaamic way. Are there any grounds on which nikkah can be delayed if two individuals are ready and do not want to fall into sin please can you provide me with advice on what can be done in a situation like this.

Q: A born Muslim girl is married to a Christian boy with her fathers consent. Her father (our close relative) told us that his happiness lies in his childrens happiness.

1. Can we break our relatioship with that relative and his family.
2. Even now also he does qurbani  in his daughter name who is now a christian. Is that ok?