Receiving interest on a loan

Q: My friend is asking me for Rs.100 for a business and he is telling me that he will give me the money after 1 week along with 2.3% of the Rs.100, that is after 7 days he will give me Rs.116. Can I take this Rs.116 or is it haram?

Moreover he is telling me how much you give me I will give you after 7 days with 2.3% of your invested money. Please clarify, if it is halal I will proceed otherwise I will not.

Secret nikaah

Q: I am proposed to my long relation cousin. Both of our parents agreed to our marriage. Actually it is their arrangement. Also with their permission we are speaking via phone. But due to my education my parents don’t want me to do nikah right now. My question is, can I discuss only with my future wife (in shaa Allah) about mahram and give that mahram amount secretly and make this relationship to be halal? Or else am I allowed to keep one or two witnesses only and make this relationship halal? I don’t want the blame on my parents because i don’t feel like its their mistake.

Paying interest on debts

Q:

1. I have a very old debt of almost 15 years back that some of the places I have the debt with has written it off and some is still charging me interest. Am I liable to pay this interests?

2. And on the other hand a friend bought things on my account also 15 years ago and the place is still holding me accountable, however the person that bought the goods have passed away. Am I liable for this account?

Woman who has a set pattern experiencing irregular bleeding

Q: A ladies haidh pattern:

May - 8 days

June - 8 days

July - She had a ghusl on 9th day but bled on 11 and 13th day. So she took the extra day as istihaaza and followed the previous months habit and made qadha of one day salaah.

August - She had ghusl on 9th day and again she bled just over 10 days.

September - She bled just over 10 days. How would she regard her habit and because she is going over 10 days, must she take her habit as 8 days and continue making qadha every month.

Marital problems

Q: My husband cheated on me and got another wife but he doesn't take any care of me or my baby. Its been 2 years now. He never takes any responsibility of me and our baby. He is too busy with his new wife. He never contacts me or when I call he uses bad language and tells lies. Can I ask for divorce?