My brother-in-law sent a message to my sister-in-law. What should my sister do?

Brother-in-law sends a message to sister-in-law, and that sister should ask directly and express her dissatisfaction.

1, direct inquiry: Sister can directly ask her brother-in-law why she sent a message to her sister-in-law, and understand the reasons and purposes behind it. Sisters can communicate objectively and rationally and avoid emotional reactions.

2. Express dissatisfaction: If the sister thinks that the brother-in-law's behavior is improper or inappropriate, she can express her dissatisfaction. Sister can tell her brother-in-law that it makes her feel uncomfortable or inappropriate and ask her to change this behavior.