Nikaah & Marriage Issues

Son-in-law making advances towards mother-in-law

Q: What remedial measures does one have to take if the son-in-law has been advancing and inviting his mother-in-law for sexual pleasures. He also reveals this to his wife that he is thinking of her mother during family life in bed. Is the marriage alive? The discord of his wife became unbearable and brought the subject to me (paternal uncle) and another cousin of hers. Both, the wife and her mother (my sister-in-law) have come with this complaint. And I am disturbed and helpless. I referred to Suraah No 58 first 5 verses and found it be a very admonishing sin and after hearing from another brother in Islam (source). Is it almost one talaq? Is the marriage still alive? The girl, my niece, does not want to live with this man any further. She is seeking separation (Khula). Keeping in mind her father's financial constraints and health and for the livelihood future of hers and her young age (sinners wife) children's future, we want the marriage to be kept alive. Please help with appropriate reply. 

Validity of nikaah

Q: I got married three years ago and have two children now. My stepfather was my wakeel as my father passed away. My brother was a witness and I was present and other family members. Is the marriage valid?

Age gap in marriage

Q: I pray you are well. I wanted to ask a question about my situation. I have a proposal for marriage from a man I like and respect. My family met him and liked him and his deen and character. However, after they found out his age at the 2nd meeting they refused without asking me and saying they decided its best. He is 14 years older than me but in good health and looks masha'allah that it is not apparent and we probably look about 8 years difference. I am 24 and he 38. Also he is pakistani and I am indian which my family were initially ok with but then changed when they found out his mother cannot speak english and mines urdu is broken. His family were concerned about the age gap to start with but have said if we are both happy and I am mature and understand what marriage entails they are happy. I want to meet the family again because I like them and can see myself amongst that family despite the differences even tho my family feel I will not be happy and that I will struggle as I will have to do everything because of the age gap and have a hard life. Can my family refuse due to age and ethnicity when they were happy with his character, personality and deen. Are they right in saying i will have a hard life because he is older and so I will have to take care of any kids we have and him in his old age as they are saying he will look like my father and a kids grandad soon and have health issues. But I do like him and we are similar in terms of personality and character and i know if he was even a few years younger I would say yes and theage gap only came to my mimd after my family started saying things because I was ready to accept because I feel he as a person is perfect for me and similar to me. And he keeps himself fit and healthy and masha'allah looks younger than his age. I would appreciate your guidance on this matter.

Witnesses in a nikaah

Q: What is the procedure of being a witness for your sister/daughters nikah? Also, does the mehr have to be given at the time of the nikah or can it be given before or after? Does it have to be given physically? Would it just suffice if it was just stated?

Showing equal love and attention to one's children

Q: I want to know that if a child was expected to do certain things (provide,work etc) for the family by a certain age even when having other responsibilities isn't it only fair to expect all the other children, when they reach that age to be expected to do the same (especially since they have lesser responsibility than the first child did) as in Islam all the children should be treated equally, so just like they will have give driving lessons to the others as they did for the first child the same way the other children should be expected to do the same chores and work for the family the way the first child did.