in laws & brother in law

I don't like my in laws because my father in law has cheated on my mother in law and my mother in law is still with him. and my father in law still is lying to her about being with her his currently engaged to the other woman and hasn't filed for divorce. and my brother in law says he doesn't want to be with his wife and how horrible she is and that she's all but greedy. His planning to get out of the service soon in the next couple of months and divorce her and leave her with nothing. him and his parents say that bitch came with nothing to this family and marriage she will leave with nothing and out in the street. I was nice enough to tell her everything after she said he already told her he wants divorce but then is all lovely dovey with her and she didn't know what to do. I felt like she needed to know but her husband cussed me out and told me to never talk to her and that he wasn't lying to her. So I got myself in hot water for her. but even today my husband and I and my in laws went to eat and on the way they told him your brother wife knows about he wants to do to her about divorcing her soon thanks to your wife you should check her phone. I had over the phone but he didn't check it. but I feel like this family is strachy and eventually she will learn on her own I was right and that she crossed me for telling him I told her. when I wanted to take her as a sister but I guess not.