Nikaah & Marriage Issues

Lineage of a child born through marrying one's mahram

Q: If a person married his mahram and children were then born from this relationship, will the nasab (lineage) of the children be established from the father? Likewise, will the ruling be the same in the situation where a person married a woman who was haraam upon him because of hurmat-e-musaaharah, ridaa'at, etc. Also, can mufti saheb please explain if there is any difference in the ruling if the husband knew that she was haraam or didn't know?

Proposing for a girl who does not speak to her father

Q: My question is that I met this girl and she and I have good intentions but I got to find out from her that her father treated her mother very badly and abandoned her and her children. So now she now she said that shew doesn’t consider her father a part of her life and when she meets him she doesn’t even talk to him.

1. Is she right to do this to her father? 

2. Can I ask for her hand in marriage from another person when her father is still alive just because she is not on good terms with him?

Marrying one's student

Q: I am a Muslim and 29 years old. I was an engineering student and during my bachelors education I used to teach Science Subjects to Intermediate co-education classes (11th and 12th Grades) in an Academy to meet my expenses as my father was suffering from financial crises. I used to control myself from developing feelings for the opposite gender and I succeeded nonetheless.

After 4 years of teaching, when I graduated from University, I found a better job and went outstation and I have been currently serving as a Senior Officer for 6 years.

When I got my job, my parents started searching for marriage proposals for me but they could not find a good proposal for 2.5 years. It has been 6 years since I left teaching.

The issue is that 2 years ago, I along with my class fellows had a get together in the University, and after having the meet up, when I was going back home, I saw one of my past female students (She was the sister of my my class fellow and I knew her even before teaching) in the University Library coming in front of me after so many years and her habit of keeping her gaze low and noble character forced me to develop feelings for her and I started to think about her as my wife.

After thorough thinking, I then sent my proposal through my family to her family and her family accepted my proposal whole heartedly because they already knew me.

My Question is that Is it allowed in Islam for me to marry her as she was one of my old students although at the time of teaching I did not have feelings for her in my heart and I am not teaching anymore? 

Maintaining one's Hindu culture after accepting Islam

Q: I am a Muslim but my boyfriend is Hindu. He is going to convert to Islam and then we will get married. My question is that after accepting Islam, he wants to keep his culture the way it was. For example, he wants to have a wedding according to the Hindu culture. Is it permissible for him to keep his Hindu culture?

Also, I am willing to turn vegetarian because he was brought up as a vegetarian. Is it permissible for me to do this?