Female in mid 20s. Sister is 15. I abso dote on her and love to plan things for her. But the more I do, the more attitude she gives me. I'm not her mum but I can't stop giving and doing coz she's my sister and I care about her! Although she gives me attitude she does mess things up when trying to do herself. I have been trying to make checklists to help her out directing her in the right direction instead of plain doing things for her. She still takes me for granted ordering me around and demanding. I need to remind myself she is just a child and not to take things to heart. I can't discipline her as she is not my kid and neither will she allow it. But sometimes it's a bit hurtful. And now that I confided in her about some things, she uses it to get her way sometimes, although in a light hearted way she feels, but I did not find it cool. Finding it difficult to have a balanced position of a sister/friend and caregiver.
PS just to add mum is present in our lives and wonderful. But past few years her involvement in our lives has not been as much as before. After work she prefers to spend time by herself. Very recently she took a sabbatical trying to recover from her work trauma.