Happy Anniversary Sir! I'm so glad to have earned your collar, learned more about myself, and learned how to be a proper slut! For example, remember how much my limits were pushed when you introduced me to Fido...and made me fuck him and you at the same time? Well, I learned that Fido is my true Alpha, and the only Master who could satisfy a bitch in heat like me! His cock has a nice thick knot and can fuck me longer and harder than you ever could. Hell, while you and I had to use condoms, Fido can even fuck me raw! Don't worry though - after Fido and the pack are done mounting me, I'm sure my cunt could use a nice thorough clean up for the next round of being their little breed bitch. And to think.. I never would have discovered this side of myself if it weren't for you! Aren't you proud of me..."Sir"?