Me being me

It took me almost 6 months to agree to licking my wife clean, a lot of pressure from my wife and her regular bull at the time.
Once I finally agreed to try it , I remember going down on my wife and seeing his cum dripping out of my wife's pussy, I hesitated for second or 2 and then felt my wife's hand on the back of my head pushing me in closer, I started to lick slowly still with my wife's hand on the back of my head, his cum was still warm and I could feel it starting tangle in my mouth.
My wife had started growning and by now had my face pushed hard into her pussy and then something happened that I didn't expect, I noticed that my little dick had swollen hard in it's cage to the point it was starting to hurt a bit as it pushed against the bars , this wasn't helped when the bull told me I was a good cuck and to make sure I got every drop of his superior cum, it was the most humiliating thing I had ever done in my life but also turned me on beyond my wildest dreams and I was instantly addicted!
Once I had finished my made me thank him for his superior seed, which off course I did.