What if I have a selfish, mean and lofty sister-in-law? To put it bluntly, she is a loser. She is lazy, stupid and pretentious. Nobody likes her, but I am a sister-in-law.

It's time for school and independence. To tell the truth, brother and sister-in-law are the people who walk hand in hand for a lifetime, otherwise your sister-in-law will suddenly become a different person. What do you think the probability is? Therefore, unless they are divorced and busy at school, they can have their own family, maintain the relationship between brother and sister, and get by with their sister-in-law.