Nafaqah (Financial support)

Equality between wives

Q: My wife said that she will let me have a second wife if I increase her allowance from 5 to 10 000 a month. If I enter this agreement with her before I marry, do I still have to give my second wife the same amount in being equal or can I give her a normal allowance of 5 000?

Wife going overseas for a business trip without the permission of the husband

Q: If a wife leaves for another country for more than 10 days for work with out her husband even though work is not relevant to support the home or personal expenses. It's just for outing and career development. After the husband forbade her from going, if the wife did not listen and left home without any mahram, what does such a wife deserve from the husband or what is the punishment according to Shari'ah for such a wife?