My wife wants to kick my mother out of the house over a cracked cup

I’ve been married for almost two years, and my wife and I have an eight-month-old son who’s truly adorable. Both of us work far from home, with my job being 60 kilometers away from hers. This means I can only visit my wife and child once or twice a week. So, I asked my mother to come and help take care of them, which is when the problems started.

My mother and wife have never gotten along. They’re both strong-willed and tend to clash over even small things. My mother is quick and laid-back, often missing the finer details.She enjoys compliments and can be a bit picky and moody. Her laid-back nature extends to the point where she can cook a large portion of one dish and eat it for two days straight.

My wife, on the other hand, is very meticulous and demands perfection. She insists that everything be put in its place, and she expects the right containers for storing food in the fridge, for example.

As a result, their daily conflicts started to build up, and they began constantly at odds with each other. I tried sitting down with both of them to sort things out, but it didn’t make any difference.

The breaking point came one night when they had a huge argument over a cracked cup. When my mother asked why a cup, which was worth so little, had ruined their bond, my wife replied: "Money is more important than bonds."

I overheard this as my mother was calling me on the phone. I immediately apologized to my mother and scolded my wife, but I’m at a loss for what else to do to ease the tension between them.

What should I do now?