Dua before intercourse

Q: Should the dua "اللهم جنبنا الشيطان وجنب الشيطان ما رزقتنا" be read in the heart or with the tongue in the following situations?

1. The husband is lying under the blanket with underwear i.e. part of the aurah is not covered by clothes, only by the blanket?

2. The husband is lying under the blanket without any clothes at all?

3. The wife is lying below the blanket with underwear, but she has no hijab, leaving her hair uncovered outside the blanket

Also, should the following dua be read with the tongue or in the heart at the time of ejaculation: "اللهم لا تجعل للشيطان فيما رزقتنا نصيبا"? Should it be read by the husband and the wife or only by the husband?

Taking oaths unnecessarily

Q: My question is sometimes I intentionally or sometime forced by my inner feeling I say "Allah ki kasam" if I do this act (example: if I eat crisps) Allah should take my soul away / kill me. I am worried because I keep on taking these kind of oaths. Will I die or what would happen to me. I want to come out of this problem of frequently taking oaths.

Breaking one's promise with Allah Ta'ala

Q: I have made a promise to Allah that I will not be doing shirk anymore. If I do (a particular member of my family or I will die / Allah should take away my soul). I am worried as I know while making the promise I knew I might be doing it again as I don't have control on my thoughts. I tried to resist myself of not taking the promise but I did. What should I do. I am upset and worried. Please advise.

Inheritance problem

Q: If the elder brother holds all the family's properties and uses them for himself and does not want to share any properties with his widow sister, and does not care about Islamic law, about sister's share from her parents properties and uses bad and rough words towards his widow sister. What should the sister do? Is it sinful to avoid talking to her brother?

Fask-e-nikaah

Q: Meri jiske sat shaadi hui thi uske sat physical relations nahi the. Is ke bad me malum hua ki wo eunuch tha. Is wajahse uski first wife se divorce hua tha (I am second) to mene me uske sat nahi rahungi a is a bolne divorce ho jayega ya usne bolna divorce paper pr sign krna jaruri he mera sirf nikah hua tha relations nahi the.

Teaching English in an Islamic classroom

Q: I am a student and in our village teachers were teaching students in the building which was unsafe and village committee couldn't find any building where students could read and there was an Islamic darasgarh on the village side where no one was reading and the village committee took them to that very darsgah. They have to stay there for 2 to 3 months till their premises will complete and they actually paid rent and is just timely settlement but after 8 days some persons came and told them it is not permissible to teach English education in an Islamic darsgah. It is a sin. Please explain to me is it a sin or not.

Saying "I will divorce you"

Q: I had given two talaaqs to my wife on different occasions and did not separate. After that one day in an argument between us she demanded that I  divorce her. I told her that I will divorce you "Main tumy talaq be day don ga". My intention was only to make her afraid not a divorce. After that we live together and noting happened. After three months of this event my wife is claiming that I had divorced her on that occasion. While I am sure I did not divorce her I just said I will divorce you. There was no intention of divorce.

Revert getting married in the presence of two witnesses

Q: I am from India and want to ask a question regarding nikaah. There is a girl who accepted Islam and is following it secretly for almost five years without her parents knowledge. (She was Hindu and from a Hindu family). Now she want to get married with a Muslim boy but without anyone's notice and fly abroad with that guy. As we know in her situation she is a wali for herself as her complete family is Hindu. She is even worried to marry in front of any Imaam. She wants to marry first and then fly abroad. Her concern is that, can she marry that boy without a qazi.