Knowing Family Destroying Secrets
Basically, my partner knows this female that used to be her acquaintance. We will call her W.
W is with a guy that proposed to her, she demanded they have an expensive wedding so he had to sell his house and live in a caravan on her moms driveway. W wouldn't move out because she had a cushty life, it was the fiance that was suffering to pay for the wedding, not her.
Now W goes to a family party and goes upstairs and sleeps with her cousin, her cousin also has a fiance who is pregnant.
W brags to all her friends about this, and that she is so much better than her cousins fiance and that is why he was willing to cheat on her. W and her cousin continue to send naked pictures to each other and sext when both fiances are asleep. This kind of petered out after a while though.
W has a kid brother (early 20s) at a family party that my partner was at that tried to force himself onto my partner. After this W kept trying to set the two of them up on blind double dates etc, and then fell out with my partner because she stayed with me and didn't leave me for her brother.
Now my question is, is it worth:
A) Telling the brother that tried to force himself on her, that his cousin who gets married next year just slept with their cousin.
B ) Telling Ws fiance so that he knows the incest he is getting in to with the cheater.
C) Telling the cousins fiance that her fiance is a cheater and them two will break up, which will also cause the wider family to find out what happened and the wedding will be a train wreck.
D) Stay out of it and hate these people in silence. (So far this is what i've done for 2 years).