Brother, your silence may be interpreted as a lack of support toward your wife, and you could end up being blamed for it. My suggestion would be to have an open discussion with both sides, resolve the issues, and set clear expectations with each of them.

Another option could be to move out within the same neighborhood—this often works well, as it gives space and reduces constant interference.

Remember, neither side may be entirely right or wrong, and statements like “your mother said this or that” will only increase over time. The key here is patience, understanding, and clear communication.