Obsessive Behaviour

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The day I got married my sis-in-law slept with us on our wedding night with her few months old daughter. She never misses an opportunity to humiliate me. That’s all done in front of dear brother who is extremely slow in deciphering her behaviour. We were newly married but still she thought that we should include her in our each and every outing. If we didn’t then she kept on bugging us with constant phone calls. The minute I opened my bedroom door she entered into it and sat with her dear brother. If I had to leave my husband’s side to open the door or attend to a phone call she will come and again sit where I was sitting i.e. near his dear brother. If we were in our bedroom, she left her few months old daughter with us. When she moved out, I breathed a sigh of relief. When she moved to another city, I was so happy. Her husband was cheating on her and she couldn’t take it. When she moved to another city she sent my husband’s ex-girlfriend’s snaps and kept him updated on her. This time I raised hue and cry and wrote her a mail ccing it to her elder sister at the same time. I never have the guts to confront her. And her family members too didn’t find anything objectionable with her and pamper her to the core. Now I dread any family meetings. I don’t want to see her or do anything with her. Again she and my in-laws are coming to meet us. And I HAVE BUTTERFLIES IN MY STOMACH. My mother-in-law calls me somewhat in this manner, Oh! What is your name? Ah! XYZ…” BUT this time I am in no mood to take sh** from anyone. Because I have a daughter and I don’t want to appear a complete fool in front of her. Otherwise they will ridicule my little one too. I DON’T WANT TO APPEAR A FOOL in front of my daughter. What should I do? Should I confront them with past issues too? My husband is physically challenged and he carries a lots of guilt for “inconveniencing” his parents and siblings. So its only me who can confront them. They don’t respect my husband too. Though he is not dependent on them in any way and looking after me and my daughter really well. Am I right in confronting them? Should I stand up to them?