I have no DC of my own but very grateful to be auntie to my wonderful young adult DN. Sis and I are late 40s now.
When her DC were younger she planned all family events and meals with my DPs with the schedule and menu that worked for her family, probably the same as most families where one sib has a young family and the other doesn't. But now her dc has left home and my DM has passed away I am finding it very difficult how dsis has basically tried to move into DMs role, still tries to make all of the arrangements, always directs all the cooking, and treats me like a guest at my DFs house. Do I just need to accept that because she had DC and I didn't that this is the way it will always be?