Inheritance from a property on rent

Q: We were three brothers and two sisters (all married). Our elder brother lives abroad. While 2 brothers and 2 sisters live in Karachi. We have one double story house in inheritance from our father in which myself and my younger brother lived till 2015. When I got company accommodation then we shifted to that house with my younger brother. As mutual understanding, we allowed one sister to live in one portion and another one to get rental income.

Now the issue is that my younger brother passed away recently (30-Jan-21) and he left two boys and one widow behind. His widow is in iddat and has no means of income. So what should be her right and her boys rights regarding their grandfather's house and its rental income.

Please advise in the light of Islamic law of inheritance. 

Writing out a will and giving gifts after testing positive for Covid

Q: My father tested positive for covid virus. He was in isolation and had taken this time to write out a will. He gave me and my mother many gifts in this time. We accepted this from him immediately. He passed away 3 weeks later.

Is this allowed or would it be considered Maraudal Maut? The other heirs say we should return the gifts to the estate.

Meeting one's fiancé

Q: Is it haraam for a woman to meet her fiancé before nikaah in the presence of his entire family but without any mahram from the woman's family?Actually, I want to know if it is totally haraam or just not permitted in Islam?

Salaah for a woman whose water broke and is in labour

Q: I would like to know what is the ruling on this particular case:

1. When a pregnant woman's water has broken and she has a bloody show, is salaah that she did not make yet now need to be made up?

2. Women were also advising another pregnant woman that until the baby's head has partly come out, she must make salaah that is due at that time as well as if dilation has been checked she must make ghusl (if she needs to make salaah) as the nurse/doctor has put their fingers inside. What is the correct view?