1, as a relative, my sister can of course be my sister's maid of honor, which also has many advantages. First of all, my sister is my own relative. It's more reassuring to give a shower directly to relatives. My sister will know exactly what kind of personality she is.

On the other hand, we are all a family, so we don't need to be familiar with the guests when welcoming guests, so we can entertain guests better and reduce a lot of trouble. However, if my sister is married and the local wedding customs have scruples about the married person being a bridesmaid, then we should respect the tradition and choose other relatives and friends as bridesmaids.