Questions relating to graves

Q: Please explain the following:

1. Is a grave sacred land?

2. Is it best for it to be flat with no heap of sand rising?

3. Should a grave be unmarked with no plank or name-plate or is it better to have it to help identify where a person is buried?

4. Can flowers etc be planted on a grave?

5. Is there reward in spending money on maintaining a cemetery including removing weeds from the graves?

Premarital relationships

Q: I am 28 years old. I am divorced. My blood relative is 25 years old. We are in love and want to get married. My parents agree and have no issue but his parents do not get agree as they say that the girl is divorced and elder otherwise they have no other issue. We really want to get married and unable to accept anyone else in this relationship. We both are mature and independent. Please tell me that what should we do. We are completely aware of the responsibilities of this marriage. Please help me in this matter.

Going to the gym

Q: I am currently very over weight and I really want to get fit. I used to go jogging before but could not keep up and eventually dropped. I didn't have the will power. Now I am really interested in joining a gym, which is open for 24 hours. Is it permissible to join this gym and attend it at the times when it is very quite?

Marital problems

Q: I have been married to a girl from Pakistan for five weeks. I was very happy until I found out that she does kala ilm. She has been caught red handed. I warned her not to do it again yet she is still doing it to make me under her control and leave my parents. Do I divorce her or accept she will continue this kaafir acts. Please help. I am suffering from depression since I found out.