"Well now, what an interesting sight this is!" I exclaimed. After all, how would you react if you came home earlier than usual to find your 13 year old stepson in the marital bedchamber, naked as the day he was born? That is, naked except for his mother's black garter belt and a pair of her silky black stockings.

"I.... um.... err.... " Peter stammered, his face flushed.

"Do you.... um.... I mean, it's not exactly normal for boys to wear their mother's lingerie, is it Peter?"

"N-no Dad" he finally mumbled.

"Then, why are you doing it?" I asked insistently. "Does it.... err.... feel good, or something?" I went on when he didn't answer.

"Y-yes Dad." He was now blushing deeply and choking back tears.

"Is this the first time?"

"Y-no Dad."

"I see" I said, letting out a long sigh. And then I did something I hadn't wanted to do since I'd come into the room. I looked my stepson up and down. He was a bit taller than average for his age and his mother, my second wife, was a "petite" woman, so the stockings were smooth on his legs. It was at that moment, and with that thought, that I noticed my cock was stirring.

Here I was, looking my 13 year old stepson up and down in his mother's black stockings and garter belt, and my cock was getting harder inside my pants by the moment. But first things first.

"Peter, I'm going to have to punish you for going through your mother's drawers." The double meanings made my manhood stir even more. "Bend over with your hands on the edge of the bed." He meekly complied. "Now put your head down" I instructed.

Moving round behind him, I raised my hand and brought the open palm down sharply on his bottom.

Slap!

He yelped and jerked, but stayed in position. In the four years that he had been my stepson I'd only had to spank him a few times, but those few experiences had taught him that while I wasn't a sadist I meant what I said. And that part of a punishment was staying in position.

Slap! Slap! Slap! Slap! Slap! Slap! Slap! Slap! Slap! Slap! Slap! went my hand on Peter's bare bottom. By this time the skin had gone a light pink, and I could hear that he was sniffing back the tears. Enough, I thought, was enough. For now. Besides, the sight of the black suspender straps on his butt cheeks had given me another idea.

"Hmm" I mused, sitting on a chair by the window. "Peter, do you think your mother would go out without wearing panties?"

"Err.... no Dad" he replied, blushing deeply again and sounding a little surprised by the question.

"Well then, how about you put some on." He looked even more surprised than he sounded. "Get out a pair of Mummy's lacy black panties and put them on. I'm sure you know where she keeps them."

"Yes Dad" he said in a strange tone. I watched as Peter opened a drawer, got out a pair of his mother's panties and tentatively held them up.

"Yes, they'll do" I said, nodding my head for emphasis. "Put them on."

After a bit of hesitation, and awkwardly balancing on first one leg and then the other, he finally managed to get the brief black lacy panties on and slowly pulled them up to his hips and over the suspender straps.

"Very nice." My cock was now quite hard inside my pants. "Would you mother go out without shoes?"

"Uh, no Dad."

"She has a very stylish pair of black high-heeled shoes. The ones she wears to the opera and the other formal dos we go to. I'm sure you know the ones I mean" I went on with a significant look. "I want to see you in them" I finished in a firm tone. The tone matched the state of my manhood.

Peter went to the wardrobe, got out the shoes (of course he knew where they were!) and put them on the floor. Holding onto the wardrobe door with one hand, he gingerly slipped his feet into his mother's four inch stilettos. They were just about the right size for his feet.

"Hmmm, very nice. Now let me see you walking in them."

After a bit of hesitation my stepson began to walk slowly up and down in front of me. He was a bit wobbly, but this was obviously not the first time he'd walked in the shoes. By this time my cock was beginning to throb.

"OK, now do you think that your mother would go out without a bra?"

"Um, no Dad. Do you want me to put one on?" he asked a bit nervously, his face still flushed.

"You're catching on son" I responded with a wink.

He opened another drawer and got out a lacy black bra. After looking at me and getting a curt nod, he slipped his arms through the shoulder straps. Then he pulled the ends of the other strap around behind his back and fumbled with the catch.

"Here, let me help you" I said, standing up and surreptitiously adjusting the front of my pants. Going around behind him I hooked the catch. "It looks a bit flat, doesn't it? What do you put into the cups?"

"Balled up socks..." he answered quickly, then stopped and flushed. The answer had been quick, so he'd done this before too.

"Well, what are you waiting for?" I asked impatiently.

Opening another drawer, he got out two pairs of sports socks, balled them up and stuffed them into the bra cups. My wife didn't have a big bowsprit, so the bra was now nicely filled out.

"Well, that all looks very nice Peter" I said, smiling encouragingly as I sat on the bed again. My organ was not only hard and throbbing, but I could also feel the wetness of pre-cum on my skin.

"You look really sexy in your mother's things. Does it make you feel sexy to wear them?" I asked, looking significantly at the little bulge that had formed in the front of the black lace panties.

"Um, yes Dad", he replied after a moment, again blushing deeply as he saw where I was looking.

"That's good then, isn't it?" I smiled and winked. "It will be fun to do this another day, but your mother will be home soon and I think it would be a good idea to get out of her things, put them away carefully and get dressed."

"Yes Dad" he replied, a little smile on his face for the first time since I'd walked into the room.

I've always believed that shared interests are essential for establishing bonds between fathers and sons.