Woman having all her meals with her mother in law

Q: My husband, my mother in law and myself live together. I don't have a full kitchen of my own but I have kitchenette upstairs with the basics - fridge, toaster, kettle and microwave. 

In Ramadhan, my husband says we should all 3 have sehri downstairs because his mother shouldn't be eating alone. I responded saying that if he would like he can go downstairs for sehri but I will be having sehri upstairs as I don't see why I should have all meals together all the time. 

Islamically am I entitled to have some meals separately. Please advise.

Meaning of the Hadith "extinguish your lamps" before going to sleep

Q: What's the ruling about extinguishing your lamps, how we understand it? 

It was narrated from Jabir ibn `Abd-Allah (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) said: 

“When the wings of the night spread – or when evening comes – keep your children in, for the devils come out at that time. Then when part of the night has passed, let them go. And close the doors and mention the name of Allah, for the devil does not open a closed door. And tie up your waterskins and mention the name of Allah, and cover your vessels and mention the name of Allah, even if you only put something over them, and extinguish your lamps.” (Narrated by Al-Bukhari, 3280 and Muslim, 2012)

Giving a loan on interest

Q: Two parties want to enter an agreement: Person A wants to loan money to Person B. 

The amount is marked up by 10% and the repayment is over a fixed period e.g. 4 years. 

If there is a clause in the agreement to say that if you pay by 3 years, you will get R2000 back. 

Is the rebate of the R2000 clause permissible? Is the allocation of marked up shares permissible?