Can a man, married having kids marry to second woman without getting permission from his first wife and kids ?

Assalam alaikum,

Islam Question and Answer - The first wife?s approval is not a condition for marrying a second wife (http://www.islamqa.com/en/ref/12544/second marriage)

Islam Question and Answer - Types of conditions in the marriage contract (http://www.islamqa.com/en/ref/108806)