I found out that my brother-in-law was sleeping with a few different women and I told my sister. I felt it was the right thing to do since I know for a fact that he's cheated before they married-I even caught him in the act one time. He cheats so close to home too that I was concerned something horrible would happen to my sister- she's already been confronted by an angry husband who accused my sister's husband of sleeping w/ his wife. Over the yrs I have discussed this w/him & he has expressed his love for my sister...begged me not to tell & I honestly did think he would stop when they got married so I was shocked to find out that not only is he still doing it..it seems like he's stepped it up! He & I did have a close brother sister relationship & my family adores him. Although there have been many accusations of his cheating over the years my sister thinks he's just a flirt. When I told her I said...I would not judge her, I would not discuss w. anyone else in the family..the info was hers to do something about it or not...it was up to her. Well needless to say said she didn't believe it...she went right to him w/the info & he denied it of course....she has cut me off...they have shared it with my family & now I'm the outcast. My grandmother says I was wrong for saying anything even if it is true...it was none of my business and the bible even says to stay out of married people's business. It was a tough decision & at this point I wish I'd never said anything but I don't see why it was wrong to tell my sister. I wasn't telling her to leave him or passing judgement. I felt like how could I look my sister in the eye knowing something & not say anything. Everyone is mad at me. Was I wrong????