Because my brother and sister in law quarreled, my husband went to play and drank too much that nigh

I think you should be cautious, your husband should be persuading your brother-in-law to reconcile with your brother, you may have misunderstood, it is normal for women to be jealous, it depends on whom it is used, you eat your brother-in-law's vinegar, there is no need, your husband is an adult, he has his thoughts, he has his way of dealing with the world, you should believe in him, trust him, the most important thing between husband and wife is mutual respect, mutual understanding, mutual tolerance, mutual trust, such a marriage is happy.

You see your husband talking to the opposite sex at close range, even if the other person is your relative, you will feel uncomfortable because you care about your husband very much. It's just that, after all, they are relatives, they shouldn't be so angry, and there is no bad behavior, so I have spoken to persuade my brother and daughter-in-law to ease the relationship between their husband and wife! So I don't think you have to think about it that much.

If you mind, you can ask him what he said to her, and it's okay to pay attention to the tone.

Well, it may be that you are careful, it may be that your husband is trying to persuade her, if there is such a thing, you should observe and pay more attention, and you can't think about it as soon as you encounter such a thing.

Your husband is just mediating to ease their relationship, it's you thinking too much.