For this issue, you can not simply say that the mother-in-law did right or did wrong. It should be viewed rationally.
First of all, we have to figure out the reason why the mother-in-law bought a standing ticket overnight to go back to her hometown for a month.
Assuming that the reason for the mother-in-law's haste to return to her hometown overnight is that something serious has happened in her hometown (a loved one has passed away or a loved one has suffered an accident, and his or her life is in danger), and the mother-in-law is in urgent need of going back to deal with it. The mother-in-law's approach is understandable, as a daughter-in-law is to be tolerant and supportive.
Assuming that there is no emergency at home, the mother-in-law simply doesn't want to take care of the children, or because she is at odds with her daughter-in-law, she will go back to her hometown for a month without taking care of her daughter-in-law and grandchildren. This is not right, there is no reason or affection to speak of, and it is not a smart thing to do. If you help your daughter-in-law when she is in trouble. When you are old daughter-in-law also know gratitude, go to take care of your wholeheartedly. And vice versa.
Again, suppose if the mother-in-law is too daughter-in-law is born a girl, son preference before the night back home, then this practice is wrong, does not deserve forgiveness. This is foolish thinking and is to be discarded.
Secondly, we need to know whether the mother-in-law had made any arrangements when she left.
Assuming that the mother-in-law bought a standing ticket overnight to go back to her hometown for a month, and that this behavior was made suddenly without consulting with anyone, then what the mother-in-law did was wrong. It's a big deal to have a baby, it's the time when you need manpower, and if your mother-in-law leaves suddenly, you're just adding to the chaos, and who's going to help take care of your grandchildren after you're done having them, and your son has to go to work, so he's definitely too busy to do that. It also disrupts the family's plans and arrangements. The son and daughter-in-law will also have conflicts because of this behavior of the mother-in-law. The mother-in-law is not doing the right thing.
If the mother-in-law had made arrangements for a series of things after the birth of the child before she left overnight, then the mother-in-law's approach could be recognized. For example, before she left, she hired a nanny to take care of the child and her daughter-in-law. Or maybe she arranged a monthly center for her daughter-in-law so that the child and adults would have someone to look after them. I'm sure no one would say anything if the mother-in-law left again. They will also praise the mother-in-law. It's not like the mother-in-law is the only one paying for someone, you can talk about each paying half. Either pay or contribute.
In summary, one must be sensible to look at the night of the birth of the child, the mother-in-law overnight to buy a standing ticket back home for a month. It is important to analyze the specific problems and not to be a man of the world.