Solution to family problems

Q: I have some family problems now a days..nothing was like this before..my younger brother never behaved like this before..now he stands in front of father ..argue with him even ready for quarrel..he was most obedient of us bt now his behavior is totally changed in a week...his age is 17 years..also there are many other problems which have started at once..i want peace in my house before...is there any special dua or prayer for it??plz help me out

Marital problems

Q: I am woman who was recently in an arranged marriage. My husbands side did not allow me to talk to my husband before the wedding, I only had a 10 min conversation with him. I raised concerns over my husband not talking much before the wedding and my parents chose to ignore this. A few days in to the marriage I discovered that my husband suffers from a mental health condition called schizophrenia. I was very upset that this was hidden from me and also my family. This explained a lot of initial difficulties that I was having with him, although I started to care for him a lot. I was worried that he may have another manic episode which will make life very difficult for our marriage. He is currently on medication everyday for this. I have decided to end our marriage because of all his symptoms and my worry for this getting worse in the future. I was with him for a few weeks and the marriage was not consummated because we were getting to know each other. I have since come home and prayed istikhara to see if I should go back to my husband. I have seen that I was being attacked by a wasp, the house was on fire and also that there were a lot of scary people and creatures waiting outiside to attack me and family. I don't know what these dreams mean. I have decided not to go back to my husband. However I find that at times my heart longs for him and that my heart longs to be with him and share my moments with him. I'm finding it difficult to think of marrying other men. I am so confused and a mess. I know that I cared for him a lot but I worry about the difficulty his condition will have on our future as it is something no one told me about. A lot of people ask me to go back and give it a try but I cannot make his condition better, the issues for the future will still be there and I don't want to consummate the marriage if we may end it again. Please give me your thoughts, am I in the wrong for wanting to leave? Will these feelings for care and love go away? I started to feel like his career and became overprotective of him and his condition.

Parenting

Q:

My first question is: In Islam, when does a child have the right to go outside and maybe socialise or even go to the mosque and come back by themselves. Say a general ruling for maybe a boy who is 13-14 years old.

My second question is: Up to what extent is an older sibling allowed to punish a younger sibling i.e. corporal punishment or verbal? 

My third question is: If your parents say something like "I don't care about what sunnah or fatwah says, it's about what I say! It's about me!" how do you respond in a respectful way.