Husband not spending time with wife and kids

Q: My husband is not giving proper time to me or my kids. I think he did a second marriage but whenever I ask him he always lies. He goes out every evening and I know everything about this girl but only nikah is not confirmed, whether he did it or not.

If he did nikah then he is hiding it from me (first wife). He gives us money, food, shelter but he does not spend any time time with me or the kids. Is he sinful for not giving time and love to us?

Drawing lots

Q: Can we use qur'ah (drawing lots) to decide?

For example: There were three hotel rooms in different floors. We were three families. So we put the names of the rooms on small pieces of paper and asked the the people to pick a paper and whatever room number he gets, he will have to stay in that room. Is it ok?

Can we apply the same principle in the other places?

Husband attributing divorce to a future date

Q: Me and my husband had an argument and then I came to my parents house. I was pregnant at that time. My husband, just to threaten me so that I would come back home sent me a message saying "divorce Septmeber, 2017". He wanted to tell me that he will give me a divorce in September but he did this just to make me upset and did not intend as such. The very next month, in April, he came to me and we had a relation and apologized for what he did. He said that he just did it to threaten me so that I would come back. We want to know if it will be counted as divorce? 

Doubting whether one had a wet dream or not

Q: I am a female, after waking up in the morning sometimes I am very doubtful whether I had a wet dream or not. I am certain that no orgasm took place. The vaginal discharge is white or clear as regular discharge or sometimes clear water as sweat in very little quantity as moisture of organs. The discharge does not even come out of the labia majoria. It is inside only. So do I need to do ghusl as I am doubtful of whether I had wet dream or not? 

Instructing one's wife to remove her niqaab

Q: I got married to a girl who wears niqab which I don't prefer, but before marriage I requested her to remove the niqab and she agreed to it and we got married. Now my questions are:

1. Is it a sin to remove the niqab?

2. Did we both commit sin?

3. Is it mandatory to wear niqab?

I personally do not prefer niqab because I am from Sri Lanka which is not a Muslim country, and I currently live in Qatar.

Conditional divorce

Q: If a husband takes a qasam that he has no relation with that lady which is ought to be his wife and he often says that they are not mine. He also says that if they say they are my wives then I give them talaq talaq talaq three time. He even holds the Quran in his hand and says that they are not in my relationship. Does it mean talaq and is it talaq for all his wives?