There are indeed many 25-year-old girls who have given birth, so it is inevitable that they will be misunderstood by others. But if they ask, you can say, this is my sister. If people feel uncomfortable. You can talk to your sister, just let him talk. That would be cuter and more likable. But if someone asks you, are you her mother or her girl, your cousin will stand up and say no, she is my sister. Isn't this cuter? It is inevitable that there will be such a misunderstanding. Actually, it's nothing. Everyone means well.