Eh, it's a year-old story. I'm not going to do anything but tell you what I know because I don't know really her side of the story asides from how she thinks I betrayed her.
But long story short, we had disagreements about the way the old Moogle Army thing was run. She wanted it to be exclusive to "only people we approve of", but since I assume she has history or personal bias with and against some people whereas I was fine letting everyone in, especially considering I was the one doing all the work. When she found out I just told everyone they're were in and I made a Moogle for Zulkir (who she apparently hated but I was friends with), I think that was her limit.
Maybe I just got along with her a bit too well that I appeared to be some sort of a "mini-Smile"? But I'm my own person, and I couldn't let her turn something that was supposed to be fun for everyone into an exclusive club for "Smile and friends".