My five year old step son does not behave properly with me and answers me back. My wife does not like me scolding her. What do I do?

Here are a few alternatives to scolding: http://sg.theasianparent.com/6-creative-ways-for-disciplining-your-child/ Perhaps he doesn't acknowledge you as an authority figure yet and scolding isn't the best way to get to him or to establish a good father-son relationship