Nikaah & Marriage Issues

Q: As part of a theatre play, a man proposes to a women and she accepts. Muslims are present in the audience. Will the nikah take place in real-life?

Q: This is my friends problem:

I am engaged to a girl. Last week I saw her with her uncle (aunts husband) involved in sex and I also found that she has an affair with 2 other people. My family and the girls family don't know about her illegal relations. Right now I am still engaged to her. Tell me what to do? I can not break the engagement because her family is very powerful. They have money and position. I cannot tell this to anyone because it is difficult for anyone to believe. I don't have proof except that I saw them with my own eyes. Please guide me what to do. Should I marry her or tell me any dua or wazifa which will help me to expose there sin in front of every one. I can't refuse this marriage or run way. 

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: Someone touched his mother in-law's body with thoughts and feelings of lust. Will hurmat-e-musaaharah be established?

Q: My dad married a woman I was involved with. We had a 1 night not even a night (20 minutes in the back of my car). He had no way of knowing. She didn't know he's my dad either. I work in another country and only met her after the weddding. I'm not learnered islamically but know that this marriage is not valid. How do I tell him that? He is my father. She has changed her life a long time ago and is in hijaab and niqaab. What must I do please advise with an open mind.

Q: I am maried for 9 years. I stayed with my parents for 8 years, then moved out for 1 year. Now my dad had his leg amputated and I think I need to move back. My wife on the other hand says she will never move back to my parents house even if it means divorce. I even told her I will build a cottage in the same yard. What is your advise? I have a 2 year old son who my parents really love. If we separate my wife will probably be spitefully and go to Pakistan with my son.

Q: I got married about two years ago. My husband is a widower and has two sons from his first wife. Masha Allah the kids and I love each other like a real mother and children. But recently I read that Islam is not in favour of adopting children and that it says in the Qur'an Shareef that "your adopted sons are not your own". I am disturbed about my position now as I had married with an intention to love these kids as my own.

Q: Why are Muslims allowed to marry four wives? 

Q: How long can we delay to perform nikah until all the guests arrive?

Q: Should food be prepared for the nikah or only for the walimah? Must it be the cheapest possible, like fresh fruit and vegetables instead of biryani?