<human>: My bf (ill call him Jake) and I started dating 4month ago,  he's amazing and I trust him very much. He's generally honest and he makes sure I know he loves me.
    
     
 Jake and I have mutual friends who are dating each other. Chad and Cathy. Important part is Chad and Jake are close and have known each other longer than I've known Jake. Cathy was never close with Jake but recently we all hangout together, and I really like her and we're becoming good Friends.
    
    
Recently Cathy confided in me that she thinks Chad is cheating. She doesn't have solid proof, but Chad is acting quite sketchy.
  
  
I forgot how the conversation went but when I asked Jake about this, Jake slipped that he knew about what was going on. He was reluctant to share any information as it was a secret between him and Chad. But in the end it turns out Chad is cheating on Cathy with multiple girls. From the start of the relationship. 
  
  
Jake doesn't want me to tell Cathy because he.. I guess violated the "bro code". I don't judge who Jake is friends with, and I'd like to honor that I not mention Jake slipped up. BUT I really want to make sure Cathy finds out about Chad's cheating. I can't keep her in the dark about this. It's a health issue as well. 
   
  
  
I urged her to confront Chad, but I'm afraid she'll chicken out. I know she will take my word if I mention Jake slipped up, but I cant do that. So help me think of a way that I can be loyal to both Jake and Cathy, I know I'm being greedy but if anyone has any idea.... Please let me know

Summarize the given text in a few sentences.
<bot>: mutual friend cheats on mutual friend, bf slipped up and told me crucial info. I'm unsure how to proceed without betraying my bf while not betraying my friend.