Button looked over to Rarity and smiled gently at her.  "After we broke up, you took it pretty badly, so Rarity took it upon herself to corner me one day after work and grill me.  Everything from if I'd cheated to if I had a thing for stallions.  I told her that if she Pinkie Promised not to tell you, I'd tell her what she wanted to know.  She understood my reasoning and did a good job keeping my secret," his face contorted into a scowl as he spoke the next part, "but apparently she wasn't entirely happy with my choice so she still decided to point out I was lying yesterday.  I can't say I'm happy about that, but she didn't break a promise and I suppose she was just doing what she thought was right."  He sighed as his face sunk into more of a neutral expression.  "But what's done is done.  I'm not going to hold it against you Rarity, but I'm not happy."