I had a fight with my sister-in-law What if she treats me as an enemy?

You can wait for this to pass for a while, and you are actively communicating with your sister-in-law. If you have done something wrong, you should take the initiative to apologize to your sister-in-law After all, everyone is still a family, and everything is just a trivial matter in life. Don't take it to heart after you get angry. Be generous and let outsiders see that you are a very reasonable person.