What happened to the family whose wife was a brother-in-law?

The wife is the devil who helps the younger brother, and the final ending of such a family is not very good. First of all, the wife must particularly like her younger brother, which means that this younger brother is probably a spoiled child. I have a friend, that is, her younger brother, who is almost 30 years old and still unmarried, waiting for her sister to get married, and then buying a house with her bride price. His sister is 82 years old, and because of this younger brother, there is still an expensive bride price at home. This is still unmarried, and married people are even more deadly. My brother's car, house and work will be enclosed by his brother-in-law. The final outcome must be split, and no one can stand such a victory or defeat.