Hi my parents in law have been of great help in helping me to take care of my kids as I am a working mum. But my mother in law likes to make noise about how I run the household and also scold my helper when she doesn't do things her way. I don't want my helper to get pissed off at her and am also afraid that she will not want to work for us. Any tips? Should I get my helper to listen to her and do things her way or do things my way?

This is a tricky question as it involves many people directly (you, MIL, helper) and indirectly (children, husband, PIL). You may want to firmly but politely tell your MIL that your helper is hired by you and the standards for the helper are set with you. However, if you are alright with your MIL's standards on your helper, then you can advise your MIL to soften her tone and try a different approach when asking the helper to do tasks. Maybe you could read this for more suggestions on how to handle your MIL: http://sg.theasianparent.com/how-to-keep-interfering-in-laws-in-line/