By Friday, when Cate announced another girls night out, I still hadn't managed to get to the "toyshop", but no matter. I had another scenario to play out.

After allowing the usual 15 minutes I urged my stepson upstairs to his bedroom, collecting the things I needed on the way. When I went into his bedroom he was already slipping out of his clothes.

"Put these on" I ordered, handing over the bra, garter belt, stockings, panties and and high heeled sandals.

"Are you going to.... um.... like last time Dad?" he asked.

"Just you wait and see" I replied with a little smile. "Now hurry up and get into these clothes." My cock was already rigid and throbbing at the thought of what I had in mind.

When he'd finished dressing I got Peter to parade up and down for a little for my benefit, before getting his wrists tied firmly together behind his back. Then I bound his arms to his body. After making him sit on the edge of the bed I firmly bound his crossed ankles, and then his legs, above and below the knees. I stood backing admired the sight of my stepson, dressed in lingerie and firmly bound.

"Are you going to gag me?" he asked timorously, his eyes on the red ballgag on the bed.

"Eventually" I replied, standing in front of him and unzipping my jeans. When I pushed them and my underpants down his eyes widened at the sight of my red, swollen and glistening member. "But first things first!" Moving right up to him I held the head of my cock out to his mouth.

"Daddy.... " he said faintly.

"Yes my boy, you've guessed it! Open wide and take Daddy in your mouth."

"Please, do I have to?" He asked faintly, looking distressed.

"Yes, if you don't want Mummy to know about your smoking. Remember, you promised to do whatever I wanted." A clear drop of pre-cum had dripped off the end of my organ. "If you don't hurry up I'll spank you with the hairbrush as well" I added after a few moments.

He hesitated a few more moments, then tentatively opened his mouth.

"Wider" I commanded. Eventually he stretched his mouth wide open.

"Good boy" I said, slipping the hot and throbbing head of my cock between his lips. Moving my hips forward, I slid the head and a few centimetres of my swollen shaft into his mouth. Mmmmm, it felt good to have the warm wetness of his mouth close around my cock.

"Suck!" I ordered. His mouth didn't move, so I grabbed a handful of his hair.

"Suck me, you dirty little slut" I snarled, twisting it.

Peter gave a muffled moan, then began to suck on my member. Tentatively at first, then more and more as I tightened my grip on the handful of his hair. I could hear him slurping and half choking on the hot and throbbing organ that filled his mouth. The sight of his bound and lingerie-clad body excited me even more.

We've all read accounts of fellatio sessions going on for ages, but this one obviously wasn't going to break any endurance records. Anyway, what did I care: I wanted to come in his mouth. Simple as that.

And I did. Almost explosively, jerking my hips forward and my cock deep into his mouth as I shot spurt after spurt of my hot, thick semen down his throat. Of course, being his first time, he choked and gagged on the flood of spunk, and it was soon dribbling out of the corners of his mouth. I was about to try and force him to swallow my seed, but this was his first time and there'd be time yet to train my little girlie boy slut to do things like that.

"Ah" I gasped, sliding my slimy organ out of his mouth. "Not bad, but next time I want you to swallow. Do you understand?" I asked, reinforcing the point by twisting his hair.

"Y-yes Daddy" he finally managed to gasp.

"Good boy."

Fixing up my clothes, I got a damp washcloth and cleaned my stepson up. Then I picked up the gag, pushed the ball into his mouth and buckled it up firmly.

"Don't go away now" I said. "I'll be back in 30 minutes."

*****

Not quite true to my word (it was nearly 40 minutes later) I returned, removed the ballgag and untied him.