Nikaah & Marriage Issues

Q: Can a married woman stay the night at her (married) sister's house, without her husband's permission?

Q: In Islam, a husband and wife are rewarded for satisfying eachother in bed, but what if a boy marries a girl by doing sihr (jaadu) on her and makes her agree to marry him? In that case will that person be rewarded by Allah for satisfying her or will it be counted as a life time rape? 

Q: Is it haraam to chat or look for a wife online?

Q: Before I married, no one told me about how mahr works. They told me that I must take whatever he gives or I cannot marry him. Is it right or what?

Q: Is it permissible to marry one's cousin (dad's brother's daughter) who is older then one by four years?

Q: Can we use toys with some kind of sound to stop a baby from crying?

Q: Is it possible to marry an ex-wife's daughter? I know a man that married a woman 13 years older and she never told him she has a daughter almost his age. They are not together any longer and he wants to propose to the daughter. Is this permissible considering he didn't know this? He didn't have intercourse with her since finding out as he was very hurt and shocked.

Q: A girl's father made her nikkah to a guy. She wasn't in the nikkah. She made her father her representative. After nikkah she wasn't living with the guy. She was still living at her father's house. Few months later she came to know that the guy is not good so she decided to break the nikkah. But her father said there was no nikkah done. After that she got married to another guy and now she is living with him. But one of her relatives is saying that her nikkah was held at that time and now she has done nikkah over nikkah. Now theres confusion about her nikkah whether it was done or not. She is now married to another guy. Is she doing zina? Is that nikkah valid? She can't even get divorced from that guy she left because these people have become their enemies.

Q: A relatives husband took another wife without her knowing. She told him to choose and if he wants her then he must leave the other wife. Please guide.

Q: I am always nervous and unhappy. Never getting success in job. I work abroad in Saudi Bin Ladin co. l send money to my wife every month but she is also not happy. There is no barkat in my house and in my salary. I have 6 children, 5 daughters and one son.

My son does not listen to his mother nor respects her. Now he started smoking hukka. l am very worried about all this. Why is this happening?