So my ex, who I plate now is friends with one of my close friends and his gf. She told me that my friends gf cheated on him with her sugar daddy recently and he found out. She also said that there’s more , my guess is a lot more, she didn’t tell him. She made me promise not to say anything. But I’ll break that promise in an instant. My problem is the fact that he’s still with her after finding out she had a sugar daddy in the first place. I’d rather just take him aside. But I don’t want to cause rifts in our social group if he decides to put my name in it and still doesn’t break up with her. I also don’t know details of the more. What would the be best way to go about it ?