Great points! :k:
What if the wife lives with her in-laws and her brother in-law? There might be a time when she is alone in her in-laws home with her brother-in-law.
"It was narrated from Uqbah Bin Amir [may Allah be pleased with him] that Allah’s Messenger صلی اللہ علیہوسلم* said, “Beware of entering upon women.” A man from the Ansar said, “O Messenger of Allah! What about the in-law?” He said, “The in-law is death.”*
[Sahih Al-Bukhari, Sahih Muslim]
The Prophet (peace and blessings of Allaah be upon him) warned against the husband’s relatives who are not mahrams to the wife entering upon her. It was reported from ‘Uqbah ibn ‘Aamir that the Messenger of Allaah (peace and blessings of Allaah be upon him) said: “Beware of entering upon women.” A man from among the Ansaar said: “O Messenger of Allaah, what about the brother-in-law?” he said: “The brother-in-law is death.” (Narrated by al-Bukhaari, 4934; Muslim, 217