Ok so I had to quick exit my game to come to forums and ask why this happened.

So I'm on my way to Markarth (I never fast travel) on Shadowmere and I see this thief down the road. I decide to stop and sneak up on her, but when I close enough to her she just walks to me and sais: "Hail Nightingale! I am rich woman, and for that, I give you your earned share. Safe travels!" (something like that, probably said it differently) and starts running down the road again. I look in the corner of my screen and it sais '500 gold added' (not much money to me, having over 30,000 gold). I'm an infamous assassin/thief, but I still don't know why she randomly gave me gold! Anybody know why?

She was being generous.

WOW! YOU HAVE SHADOWMERE? AND OVER 30,000 GOLD! THAT IS SOOOOO IMPRESSIVE DUDE!! YOU ARE MY HERO!!!

You svck at sarcasm.

IS YOUR CAPS LOCK KEY ALSO BROKEN?

A thief? Being generous?