Mahrams

Q: Who are the relatives with whom purdah is not necessary. Should I do purdah with my grandmothers sister?

Q: I have been reading up on Hurmat Musaaharah and had the following questions:

1. If a boy touches his sister with lust, are their children, etc. allowed to marry each other?

2. If a boy touches his cousin (parents siblings children) with lust, are their children allowed to marry each other?

Q: Is the step father in law a mahram? The girls husband's father who is not his biological father.

Q: Is my wife's step grandmother considered as my mahram?

Q: I am a woman. I have received a marriage proposal from my maternal cousin for his son. My query comes here as I have never considered him with any other feelings except as a son/nephew as he born to my cousins sister. And now my doubt is as I have felt him as my nephew/son, is it permissible for me to marry him? Will my marriage with him be accepted by Allah? Earlier I have considered him as something else, and now I am entering into Nikah with him.

Q: Due to physical illness I (psychiatry disorder) lost my physical desire. I am 20 years old and no one knows in our house that I lost my physical desire. So what order of parda is implemented on me for my non muhram. Should I observe parda from them now as I observed parda from them in the past?

Q: I'm a female. Is the brother of my grandmother (mother of my mother or mother of my father) a mahram for me?

Q: For a female, is her father's mothers husband her mahram? (The fathers mother and this husband have children).

Q: Can my husband be a mahram for my Taima (father's big brother's wife)?

Q: Can a widow step mother and step son stay alone without a mahram. My father in law passed away 2 years back and my step mother in law says that she is my husband's responsibility now. They stay together alone discussing things and as a wife I am not comfortable with this.