According to common sense, sister-in-law marriage as elder brother sister-in-law is a must, and there are two situations for people who generally ask this topic:

The first type: you can't come back to attend the wedding due to special circumstances; The second type: unhappy family conflicts;

Marriage is an important event in life and a good day for happy reunion. It is also a traditional virtue of the Chinese nation to go to the scene to send blessings to newcomers. Therefore, as long as there is no special reason, it is really impossible to come to the scene. I believe my sister-in-law can understand. If there are some contradictions and misunderstandings, I should participate in them, and I will take the opportunity to untie the knot. It is not very good for a family to be beautiful. I wish all lovers will be well.