Agent taking a commission

Q: My company arranges business agreements between two parties. According to the business agreement, the first party pays money to our company for the second party that gives service to the first party. Our company acts as a business agent and takes commission from the money given to us as fees for the second party without telling the first party but with the permission of the second party who already worked with us.

Also, we take another fee from the first party while telling them that it is our service fee for arranging the business agreement with the second party and it is a clear dealing.

My question is about the commission that we take from the second party fees without notifying the first party (payee) is halal or not? Because this commission is the main source of income for my company. If this commission is not permissible then the salary I take from the company is halal or not? 

Giving up porn and smoking

Q:

1. I have an e-cigarette. It is like an alterative to a cigrette and I've got lots of different types and spent alot of money on them but I want to stop it completely. Should I throw them away and go against my nafs?

2. I am a younster with hormones and I used to make accounts to watch naked women perform acts. Each time I had the urge I'd make a new account. Should I leave the accounts and ask for forgiveness and not go back to the accounts even if the accounts are there and not getting used? Will I be sinful everyday if the accounts are not there because I don't know how to delete them.

Inheritance

Q: My mother has only four daughters and no son. In preparing her will, my father and the four daughters are her primary heirs. She also has two sisters and two brothers. Are they entitled to an inheritance from her? If so, what will the distribution be among all her heirs?

Women cutting their hair

Q: Are women allowed to cut their hair? I heard some scholars say that this is not permitted because it is an imitation of men or the Kuffar. However, doesn't what is and isn't imitating men change with culture/times? Nowadays nearly all Muslim women cut their hair, and women cutting hair is considered normal in my culture (Turkish) and not all an imitation of men. Not to mention long/heavy hair is very difficult to maintain, and hard to cover fully when wearing a Hijab. So as long as the haircut does not imitate the Kuffar and is still long (not imitating the men), then is it permissible? If not, what is the proof of this?