Cheating husband committed suicide and relatives blaming wife

My sister got married in 2016 , couple of days aft d marriage my brotherinlaw told my sis that he loved someone and my sis is his second wife , and later he said that hes jus jocking and again he said its a second mariage . finally he said he loved a lady and he shared his girlfrnds pics to my sis,my sis told this to the elders in family and asked for divorse but they tried to settle the issue and somehow managed my sis to be with my brother in law , but they both couldnt .eventually my sister told my borther in law that she too loved someone , When the dispute is gng on bro in law met d lady he loved .so does my sister ,she met the person she loved .my brother in law took this as a tool and started complaining against my sister,and my bro in law also some how got the pics of my sister being with the person she loved .my broinlaw committed sucide blaming my sister for that. And all my relatives also started blaming my sister for this.Is there any wrong in what my sister did?