Nikaah & Marriage Issues

Q: Is it permissible to have relations with one's wife during pregnancy? If yes, is it harmful for the foetus?

Q: I just wanted to ask a question. I am having my nikaah done at the mosque in a week. I have researched upon the topic of allowing your husband to remarry. I wanted to have a condition in my nikaah that my husband should not remarry whilst he is married to me. If he was to do so and hide it from me he will be negligent upon his part. My query is where I live we don't have any blank space etc on the nikaah form to write such a condition. Is it enough for me to just mention it to my husband at the time of nikaah or before etc? He is already aware this is what I want as I have told him before. But online I have read on many sites that you should mention these things at the time of the nikaah otherwise it will not be valid? Please tell me how I should go about it.

Q: As per the need of the time of those days, the devaluation of money is going so fast and islaam made the nisaab of zakat in gold and silver. According to this if we make the transactions of mahr in Nikaah in gold, will it be valid shariah or not. In the case of divorce I find a man divorced his wife after 10 year's of the nikah, that time the Mehar was Rs. 1125/= that's also not paid at the time of nikah. With the papers of divorce, he sent the same amount to her after 10 years. So if they made the transaction in gold, the divorced woman would have something to support her for the future.

Q: Is it possible to take my sister-in-law for hajj with me? She is a widow and the Quran says that we can't marry two sisters. Also we find that Hazrat Usmaan (Radiyallahu Anhu) got married to two daughters of Rasulullah (Sallallahu Alayhi Wasallam). Please confirm.

Q: A girl is engaged to a guy, her nikaah will be after few months. The guy's sister is close friend of the girl. So is there anything wrong if the girl asks her friend who is the guy's sister to convey him some deeni demands that she has from her future husband? (like the girl wants her husband to get involved in work of tableegh and wear Islamic dresses and few other demands). Similarly, is there anything wrong if she put forth these demands to her future husband via his sister?

Q: A girl is engaged and she chats with her sister in-law via whatsapp. Is it allowed for the girl's fiance to see the chat if the girl has messaged something related to her fiance? Like the girl has a few Deeni demands from her future husband so she messages the demands to her sister in-law. So can the fiance read the messages directly from his sister's phone?

Q: My question is that I have been married since 2004. She is often busy with kids and we don't find time to have pleasures with each other. Masturbation is not allowed in Islam but if your wife lets you masturbate with her own hands is it allowed. Secondlly, after having long intervals is it allowed to masturbate with using hands like while taking shower throw water on penis to feel satisfied or relaxed and to avoid wrong doings outside?

Q: A girl is engaged and her nikah will be after few months. Her mother in-law telephones her and asks her khair khabar once in a while she also telephones her. Is there anything wrong in telephoning one's in-laws before nikaah? Please note that she doesn't speak with father in-law or her fiance as they are not halaal for her yet. She just speaks with her mother in-law and sister in-law.