He didn't suck. Somehow he knew I was close and he wanted more of me.
'Do me please,' he whispered, pulling off me and turning to spread his legs and holding his cheeks apart. His cock and balls dangled so enticingly in front of me and I wanted him in my mouth again. But this was for him. My cock was slick with his saliva and my precum and I bent to his anus, kissing it and licking as much of my saliva on to it as I could, my tongue just entering and wetting the opening. I put my cock there and slowly pushed. I felt his tension and realised that this was his first time too, and I held his hips to steady us both. I pushed slowly, but steadily and without withdrawing. I made little progress at first but gradually I felt his passage expand to welcome me and, contrary to my expectations, he expressed no sound of pain or distress or discomfort. Rather he voiced some little moans – of pleasure, not pain – and pushed firmly back to me clenching his muscles to stimulate me.
Once again I knew I could not hold out much longer and I worried that, pleasant as this was for me and I thought for him, that it would be over before he would get real satisfaction from the act. But he started moaning louder as I started moving in and out, building up the speed and intensity of the fucking. I spat on my hand and reached down and around taking his cock in it and letting it run up and down my palm in time with my thrusting and his response. Just as I knew I was about to come, he started making growing noises in his throat and as my first spasm blinded me with the white light of orgasm, he too roared out and his body bucked hard, his balls tightened and quivered and his cum spurted on to my hand and along his thighs and belly.
I ejaculated perhaps ten times before the storm ceased and my breathing started to return to normal. I was still inside him and lying across his arched back, hand sticky with his cum and feeling more alive than I had for perhaps thirty years.
'Oh god!' he said, 'oh god!'
I slowly pulled back and my cock softly popped out followed by a trickle of semen. I turned him over on his back on the floor and after kissing his face and his eyes and his lips, moved down his body to lick and clean up the pool of cum he had left there. For the second time I tasted his fluid and lapped it greedily and wrestled with the image that kept jumping into my brain of family, colleagues and friends being disgusted at the sight of me, the middle-aged, self-identified, more or less monogamous, heterosexual man sucking, fucking and devouring the cum of a boy young enough to be my son. I thought of my wife and what this meant to our relationship. Then I heard Boy saying softly, 'I've wanted you all my life,' and then again, '... Daddy. '
When I finished cleaning him we lay together, he, still naked apart from the thong that was now draped around one thigh, and me with my suit trousers around my knees and my shirt and tie still on. He nestled in my arms and kissed my cheek. I had an idiotic smile on my face and an adolescent's love in my heart.
And my cock was rapidly becoming hard again...