Masako or Yuki?

My friend Robb's blog reads like a soap opera, but interesting. He's been posting like a fiend lately too. Read this sentence:

But she and Masako work together so if I wanted to take out Yuki, Masako could find out and I don’t want to burn bridges. Advice?

I can't effectively convey the feeling of the whole post, so just read it and help Robb with your comments.