Nothing. Mom makes the first move.

I leaned back against the couch, my head lolling back as Mom took me deep into her mouth, small gagging sounds escaping her as she tried to take all of me into her throat. My fingers were pumping in and out of her wet sex, her ample ass humping back against my hand, trying to get more of my fingers deep into her eager pussy.

Mom let out a soft moan, humming in pleasure around my cock as I worked my fingers in and out of her, her tongue teasing over me as I felt the familiar pressure of my climax beginning to build in the pit of my stomach. I know it's wrong, that I should stop this, but I want to cum in her, either in her mouth or in her pussy, the thought of either place pushing me closer and closer to my climax. My hips were bucking up off the couch, pushing as much of my hard cock into Mom's sucking mouth as I could, her hand tight around the base of my erection, her fingers stroking what she couldn't fit in her mouth. She must have sensed how close I was to cumming, knew how close my impending climax was because she suddenly pulled her mouth off of me, her hand gripping my cock tighter, keeping me hard but denying me my orgasm.

"Wha..." I started to question, only to have Mom hiss me into silence, her fingers tightening almost painfully around the base of my cock as she lifted her head from beneath the duvet. She sat up, her movement pulling my fingers from her now flooded sex, and I was sure that she'd realized what we were doing, had come to her senses and was putting a stop to our forbidden tryst. I was just opening my mouth to say something, anything, when Mom pushed the duvet to the floor, facing away from me as she threw her right leg over me, straddling my legs. Her hand still held my hard cock tightly, her other pulling her loose cotton shorts aside as she gradually, ever so slowly, sat down on my lap. We moaned in unison as the bulbous tip of my cock pressed into the cleft of her sex, parting her, sliding easily into her wet eager pussy. Her head lolled back, her back arching as she lowered herself onto me, her body gripping me tight. My hands came up, gripping her hips, gently pulling her down, wanting to be deeper in her, to feel all of my cock buried deep inside her.

"Gently," Mom murmured, resisting my pull, only taking about half my cock into her. "I'm not used to... you're so big," she gasped, her hips rocking back and forth, sliding her pussy up and down on my hard cock.

I looked down between us, watching with awe and lust as my fat cock split her plump pussy lips, stretching her open as she slowly rode me. Her juices wet my shaft, glistening as she lifted herself up and lowered herself, each time taking a little bit more of me, a low purr of pleasure escaping her as she gradually worked more and more of my large cock into her hot sex.

I was getting impatient, wanting to feel all of myself in her, to be completely buried inside her. My grip tightened on her hips as she slowly lowered herself once more, pulling her down hard in one sudden move, my hips bucking up as I impaled her suddenly on my cock. Mom let out a loud gasp, a combination of pain and pleasure as I filled her, her head lolling back slightly as her sex convulsed around me, small muscle spasms as she tried to get used to my size. I gave her a few moments to get used to the sensation before I started thrusting up into her, my right hand releasing her hip to grab a handful of her hair, pulling her head back as I fucked up into her.

Mom's hand reached out behind her, bracing herself against my chest as she started moving her hips faster, bucking back against me in time with my thrusts. Low grunts of pleasure escaped her throat with each thrust, her movements growing faster, more eager, as she gave herself over to the forbidden rough sex.

"Oh...... Oh.... Oh...oh..oh.Oh," Mom gasped rapidly, her body suddenly going still, her muscles tensing as she came on my cock. The sensation of her sex climaxing around me, convulsing, squeezing me tight, was enough to push me over my own brink. I grit my teeth, my hand squeezing her hip hard as I pushed as deep into her as I could, my cock feeling like it was exploding, jerking, bucking deep in her as I came.

Neither one of us moved for a couple of minutes, both relishing the afterglow of our orgasms. I was worried about what Mom would say, about how she'd react now that the heat of the moment had passed. I held my breath as she slowly lifted herself off of me, a small sigh escaping her as my flagging cock slipped out of her, a small tide of our juices bubbling out of her sex as she stood up. She fixed her shorts, pulling them back into place, without looking at me, the silence of the moment stretching out long. I was sure that she was pissed, that she was furious with me for what we'd just done as she moved silently towards her bedroom door. It was only when she paused in the doorway, looking back at me, that I let out a sigh of relief.

"We should have duvet days like this more often," she sighed with a soft satiated smile, her eyes shining slightly as she looked at me for a few seconds before disappearing into her bedroom, shutting the door silently behind her.

"Yes, we should," I murmured my agreement to the empty room, my hands pulling my shorts back up, tucking my now soft cock back in as I shook my head in disbelief at what had just happened.