We live in a joint family with mother in law, father in law, and husband’s sister who is not married yet. Me and my sister-in-law do have minor altercations through the day on small household things. I do not take these things to mind, but she gets very offended. Every night when my husband comes home, she sits with him and cleverly portrays herself as a victim. My husband then blames me, we end up fighting almost every night, and it hurts me. What can I do to make him understand the situation?