1. Timely communication: inform my brother and family that they can't attend as soon as possible, expressing regret and blessing.

2. Support: You can support the wedding in other ways, such as remote video participation, giving gifts or greeting cards.

3. Seek understanding: explain the specific reasons why you can't attend and ask for the understanding and support of your family.

When the elder sister can't go home to attend the younger brother's wedding for special reasons, it is important to keep in touch with her family and express her support and blessings as much as possible. Although physically unable to be present, psychological support is equally important.