One late night on my way to get a glass of water, I stumbled upon him in his study. He wasn’t working at all, at least not on school work—he was stroking himself. I had been stealing looks at his bulge for years, and had seen his beast from around corners. It was impressive even when it was flaccid. But watching him here tonight, and seeing it in its full glory, fully engorged, was something else altogether. I was utterly mesmerized.

I had to wonder what had made him so worked up. Was it just the stress from work? Who was he thinking of? Was it me? Was it a student? Suddenly though, he caught me. He snapped off something about boundaries, but made little attempt to hide his cock from me. It wobbled back and forth as he admonished me. I couldn’t just ignore it; I let him know that I was impressed. He was quick to cave. His boy might be pervy, but, well… so was he.

I came in and sat beside him, his tree-trunk thighs framing his manhood beautifully. He told me I could touch it, and it’s good he gave me permission, because I needed to touch it. His thickness and weight felt amazing in my hand as I stroked it. A new need arose—I wanted to taste it. My mouth was going to taste my dad’s cock.

But he knew I had never done that before. I was a bit meek about it. I know the general concept of a blowjob, of course, but when a beast of a cock is actually in front of you, it's different. Performance anxiety sets in. Sometimes, when you finally get what you want, you just don’t know what to do with it.

But, I worked up the courage and I opened my lips. As if it was always meant to be, my dad’s cock was in my mouth. I couldn’t believe it! It was huge, and seemingly kept getting bigger and bigger in my mouth. It tasted amazing; it was salty and velvet. I choked a bit as I tried to get it as far down my throat as possible. For an absolute novice, I wasn’t doing bad, I thought, and Dad looked all too proud of me.

To briefly relax my jaw—my dad was quite big, after all—I got undressed. As I did so, he stroked and watched intently. I could feel my nerves going crazy, but my lust was far more powerful. I went back to servicing Dad’s cock with my mouth. He caressed my arm tenderly; the mix of affection and animalistic lust was intoxicating. Dad moaned, and after some time, he looked me in the eye, and asked me to sit on it.

I had no hesitation, and my nerves were long gone. I hopped right on to his lap, ready to have my cherry popped. His giant cock head popped right in, and I winced and whined a bit as I slowly slid down the rigid slab. But I was determined, and sooner than either of us could have fathomed, he was all the way in.

I gyrated up and down, bringing the entirety of his flesh in and out of me. The ride got easier the longer I bounced. The chair squeaked as we picked up the pace. He told me he was close, and something about hearing that made me buck up and down even faster. It was like a switch was flipped inside me; my body just knew what to do.

Eventually, he shot his load. I could feel his warmth within me, smearing my insides and marking me in a way I would never forget. My ass was covered in his cum, the last drops of his orgasm dripping from my cheeks and onto his thigh. I kissed him and jerked myself off, blowing my load all over my Dad’s chest. He scooped my load off his chest and tasted it. I suppose that meant my warmth was now in him, too.