It’s okay to admit your sibling’s win stings. Pretending it doesn’t just makes the sting last longer.

You can be glad for someone and jealous at the same time, and neither one cancels the other. The trouble starts when you decide the second feeling is not allowed, because then it goes underground and shows up as distance, or a flat voice at dinner, or being unavailable the week of their thing. Named in your own head, it usually shrinks. Hidden, it hangs around.

Let yourself think the sentence plainly: I am happy for them and it stings. You do not have to announce it to anyone. Then go congratulate them properly, which is easier once you are not also hiding something.