Ill treatment from one's sister

Q: I am a lecturer. My sister couldn't qualify her studies. Her issue is anger. This makes her life difficult. She is unmarried and 37 years old. She considers me to be responsible for her studies and marriage. She didn't allow me to get married. She broke things and hit me and abuses me. My mother is old and she cries when this happens. What should I do?

Reciting Quraan while other passengers are listening to music when travelling

Q: I travel quite early to work and I travel with other people. I try to recite Quraan after fajr, that means I am travelling to work at that time. In my transport the people listen to music. I want to recite Quraan. Can I read even though there is music playing in the background? May Allah Ta'ala protect us.

Seeing brown discharge after the days of haidh

Q: My last haiz (or what I considered my haiz) was June 28 - July 4 and remained a brown colour throughout. It looked like discharge and for 1 or 2 days had red streaks of blood. Then it continued as brown discharge/ blood , im not sure. Today (July 15) I have got the same brown discharge / blood. But I have not had a 15 day gap of purity so I have continued to pray as I think I have istihaza.

1. Am I right in thinking I should be praying now?

2. Should I have prayed during the first time I experienced the brown discharge / blood

3. I have read online that there must be a 15 day or 10 day gap of purity - I would like to know where the evidence for this is.

4. I also heard the ruling for istihazah is to clean with instinja, I do this but still blood remains, so I pray anyways. Is my prayer valid or must I repeat them once I am pure?