My MIL is staying with me as she helps to take care of my 3 kids. The issue with her is she thinks she's always right, hot tempered, always scold my kids, let my kids watch phone in the dark and so on. She can't be confronted and if so, she will threaten not to take care of my kids. Worst, she made me her target to throw tantrum at. Hubby will not talk to her to correct her behaviour as he thinks he can't do that as his mother is sacrificing to look after our kids. How to win back husband over mother-in-law? I am so depressed now.

This sounds really tricky. :( I would propose sitting your husband down and discuss what are his thoughts on some of the issue without highlighting what your mother-in-law is doing. For example, ask him how he would handle if he sees your children using the phone in the dark. Just to get a sense of how he feels about the issue. It will be tough convincing someone who does feel that there is anything wrong with the current situation. If he agree that it is not ideal, then ask him to propose some solutions to remedy the situation. It is tricky having to deal with relatives for help in taking care of your children. If it is possible, are there other options to consider (childcare centres?). If your mother-in-law is not that keen on helping, it may be less straining to the relationships if other alternatives could be explored. All the best!