My brother-in-law harassed me, but I couldn't tell my sister. What should I do?

Tell your sister, dear, that you are responsible for yourself and your sister. Such a man is too much, and your sister will be hurt in the future. If your sister knows these things, she won't forgive you. Don't hold it in her heart. Tell her she has the right to know for your sister's sake, or she won't understand you. . .