I jolt awake to a soft tapping on my shoulder, the room shrouded in darkness except for the faint glow of the digital clock. It's Toby, my eight-year-old son, his big eyes wide with fear from some nightmare he can't shake. 'Daddy, I had a bad dream,' he whispers, his voice trembling and innocent, the kind that tugs at my protective instincts. I'm naked under the sheets, Sandy snoring lightly beside me with her earplugs in, oblivious as always. Our king-size bed has plenty of space, so I scoot over and pat the spot between us. 'Come on, buddy, climb in,' I say, my voice groggy but warm. He's only three feet tall, slender as a reed, wearing those silly SpongeBob underwear that hug his tiny bubble butt. I don't bother grabbing boxers or waking Sandy; it's the middle of the night, and exhaustion wins out. He snuggles in, and I drift back to sleep, his warm body pressed against mine. Hours later, I stir again, my cock rock hard and throbbing, nestled right between Toby's ass cheeks. The thin fabric of his underwear is the only barrier, and it's driving me wild. My balls ache with need, heavy and full, even though I fucked Sandy just hours ago. The air still smells like our sex, a musky scent that clings to the sheets and amps up my arousal. I try to stay still, not wanting to freak out the kid, but then I hear his breathing change—deep and deliberate. He's awake. My heart pounds as he shifts slightly, his ass grinding against my shaft, making me leak precum. His hand reaches back, small fingers brushing my erection, exploring it with a curiosity that sends a jolt through me. 'Daddy?' he whispers softly, his voice full of wonder. I freeze, pretending to be asleep, but he doesn't stop. His fingers wrap around my thick, uncut cock, stroking it gently, and then he guides my hand to his own small erection, that budding cocklet stiff and eager under my palm. It twitches at my touch, and he shudders, letting out a quiet moan. 'What are you doing, baby boy?' I murmur, acting like I'm just waking up, my voice low and husky with the lust I can't hide. He startles but doesn't let go, his grip tightening a bit. 'I don't know, Dad. Yours is so much bigger than mine, and it feels... funny in my belly. Empty, like I need something.' His words hit me hard, my mind racing with taboo urges I shouldn't entertain, but my body betrays me, thrusting slightly against him. 'Yeah, cocks come in all sizes, especially for someone as small as you,' I say, my breath hot against his neck as I start pumping his little dick, feeling its smoothness and how it leaks a drop of clear fluid. He arches into my hand, whispering, 'Can we keep touching? It feels good.' I nod, even though he can't see it, and slide his underwear down his legs, the fabric bunching at his ankles. Now there's nothing between us, and I press my cock back against his bare ass, sliding up and down his crack. The precum slicks everything, making each thrust smoother, and every time I brush his tight hole, he moans louder, his body trembling. 'That feels really good, Daddy,' he pants, his voice breathy and full of need. I keep jerking his cocklet, my fingers wrapped around its small girth, feeling it pulse in my hand. He's arching more now, lining me up perfectly with his entrance. On one thrust, my cockhead pops past his rim, and we both gasp. It's so tight, his virgin hole clenching around me like a vice. 'Daddy, it hurts... but I want more,' he whines, his voice a mix of pain and pleasure that makes my blood boil. I can't stop; I'm too far gone, so I push in slowly, inch by inch, through his winces and soft cries, until I'm buried deep inside my little boy. His ass grips me like nothing else, and I start thrusting, harder than I probably should, but the sensation is fucking incredible. Then, I feel a hand push mine away from his cock. I look over his shoulder and see Sandy, her eyes locked on mine, a wicked smile on her full lips. She's ditched her earplugs, her silky nightgown riding up to show her curves. 'Mommy?' Toby questions, his voice shaky. 'Don't worry, baby,' she purrs, wrapping her hand around his small prick and starting to jerk it with expert strokes. She lowers her head to his lap, those busty tits pressing against his thigh, and sucks his tiny cock into her mouth. Her lips work magic, bobbing up and down, slurping and sucking like only she can. I match her rhythm with my thrusts, pounding his ass deeper, the sound of skin slapping filling the room. Toby's moans turn into gasps, his body clenching around me as I fuck him raw. 'Oh, fuck, that's it,' I grunt, my voice rough with urgency, feeling his hole tighten even more. Sandy's mouth works faster, her tongue swirling around his tip, and it doesn't take long before he cums, his small body shaking as he clenches on my cock. That pushes me over the edge, and I explode inside him, filling his ass with my hot load. Sandy swallows every drop from him, her eyes gleaming with delight as she pulls back, licking her lips. 'Mmm, more,' she whispers, her hand trailing down to tease his oversensitive cock. I keep thrusting slowly, savoring the mess we've made, wondering what's next in this forbidden night.