Hi IL's , Please bear my very long vent. I have been married for 4 and half years now and have a 3 year old daughter, mine is a love marriage which both of parents agreed and arranged. Now the problem between me and husband is very very silly and not related to both of us. Recently my younger BIL got married 2 months back and my younger co sis gradually become very close to me since the match got fixed and shares her everything with me and she co incidentally also happens to be my very very distant relative from my mother's side. So recently she broke down before me about an affair which my BIL has maintained abroad with his foreign colleague before wedding and it is still continuing even after their engagement and wedding. She saw the messages on his phone in which my BIL and his GF are chatting about their sex life and planning how to secretly continue the affair without knowing to my co sis. All this happened just one month into their marriage. I was so upset and didn't believe all this as i trusted my BIL a lot and have a very good rapport with him from many years I feel him as my friend and brother also I tried to pacify her that she might have mistaken him but to prove her allegations she has sent me all the screenshots from his phone and I too was shocked about all that in fact what my co sis said was true. I informed my husband about his brother's deeds and asked him to advice me on how to deal with my co sis who is everyday venting before me about my BIL and i am not able to avoid her as she says she didn't tell all this to her parents and her only hope to share is me. I also shared the same issue with my mother who advised me how to deal with this situation and get out of it. Then yesterday my mother called up to me and was telling that she got a doubt that my co sis shared everything with her parents because her parents have behaved very differently with my father and mother when they met them yesterday on some occasion and my co sis father slightly hinted my dad about the problem and was blaming as if my parents didn't inform them beforehand about my BIL affair inspite of being relatives before wedding itself and my dad got a little upset about this as they also have thought my husband's family is quite good and my BIL was a good person. All the while I was talking to my mom and asking her to take it easy and forget everything my husband sneaked on me and listened everything and started a fight that I am sharing everything with my mother and accused that we are badmouthing their family and his brother never did any wrong and their family is very good and all that stuff.. I have said why are we fighting about some other outside issues and we need to stop and be happy and don't care about his brother and his wife. He said that I am spreading wrong rumors about his brother and telling everything to my mom and i am not a good person and he have lost all the respect for me and he will never talk to me in his life. I was very angry and said ok dont talk to me its ur wish, i didnt spread any rumors about him its what all i know what he did and i also have screenshots of his brother's chats and again told him this is not a very good reason to fight and lets leave it here and also I was ready to say sorry to him that i shared with my mother and was also ready to agree the mistake is mine. In rage I told him that his family was very bad and nobody is good and we also would have checked their background before our wedding I have trusted you and your family so well and now you are accusing me that im badmouthing (As my MIL also is not a very good person and had an affair before wedding and got pregnant with some one else's kid got aborted and married my FIL which I came to know this from my MIL's sister 4 years back and didnt let my husband know till now she also had 2 or 3 affairs even recently after my wedding and dresses provocatively even at the age of 50, all which i have kept for myself and adjusted as my husband is a very good person.) I was about to say sorry for what I have said but my husband suddenly called my mom and dad a very very bad word ( prostitute and son of a b***h kind) and i just couldn't bear, tears rolled down my eyes and i lost all my respect towards him I never thought he talks like this I could have told him about his mother's affair and abortion and about her character and not my parents but his mother is such a person but stopped myself very hard and cried silently all night and till now I am not talking to him. I don't know whether I did any such wrong that my husband had to use those words to my parents and i find it very very silly thing that we are fighting about. How to deal with this now. I am not able to forgive my husband as he used such bad words. Even knowing about his mother's character I never used those words on her till now and i will never use such words towards elders in my life.