Nikaah & Marriage Issues

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

Q: Does a father have a right over his child born out of wedlock? Are children born out of wedlock attributed to the father in Islam?

Q: Is there a reward for a woman whose husband has taken another wife?

Q: I am born a Muslim but I got distracted at some point in my life and commited adultery with my ex boyfriend. However I got married last year with a virgin man. I did not repent before getting married because I did not realize that it had to be done. I have been realising my mistakes lately and I cannot tell you how ashamed I am of my past. I repented to Allah several times after marriage. 

Now I got to know that in the Quran it is mentioned that a fornicator cannot marry a pure man. I have also read that the scholars say that if a person repents, only then can they marry a pure man. As I have mentioned that I have repented from my heart and I still am repenting but it is after marriage.

Will my marriage still be valid? Or do I need to renew the marriage contract? My husband doesn’t know about my past. Please let me know what should I do now?

Q: Is it permissible in Islam to file the nikaah while the bride is in her menses (haidh)? Is nikaah jaiz for the girl in the days of her menses (haidh)?

Q: Husband has 2 wives; one is a housewife and the other one is working. The husband said to the working wife that she should bear all the expenses by herself because she is working. What should be the distribution of nights as the working wife only visits on weekends and for the whole week the husband spends his time with the one who is the housewife.

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: When I got married, I used to live in a standard size room. When my sister got married, me and my wife moved to another room which is a smaller room. I gave up my room to my sister and her husband. Now my wife is making an issue to get back the same room which we used to live in before. What does Islam say about this?

Q: My husband did not touch me for the last 2 years even though we are living in the same house with 2 kids. Is our marriage still valid? 

Q:

1.If someone touched his brother's wife with lust. Will this break his brother's marriage with his wife? Are their children/grandchildren, etc. allowed to marry each others?

2. If someone touched his own sister with lust. Will this break his sisters marriage with her husband? Are their children/grandchildren, etc. allowed to marry each others?