What is the importance of the seats Emma and Claude's real father choose to sit in and watch his performance, even though they have not been in contact for many years?

The importance of the seats that Emma and Claude's real father choose to sit in and watch his performance, even though they have not been in contact for many years, is that they each choose the same seat, although in different concert halls to watch him, which reflects their involvement in Claude's life. The seat they each choose is the last row aisle seat because they feel they don't have a claim on Claude's life since Claude virtually raised himself. Their choice of seat mirrors their involvement in Claude's life--from the fringe.