DISCLAIMER: I do not own any of the characters in the following story. They are from the movie Grown Ups/Grown Ups 2 and thus belong to the owners of the franchise.

This is a work of pure fiction and is centred around Greg and his Mum, Roxanne. This is the chapter where the story line will splinter away from the movie and the smut begins in proper.

WARNING: This fanfiction will contain a level of smut between two family members. If this is not for you, don't continue to read. If it is, enjoy.

Greg's POV:

I leaned forward enthusiastically into the kiss, my cock now throbbing underneath my underwear, all pain forgotten. I felt Mum's hand slide around my back and before I could react, she had grabbed my ass and pulled me in closer towards her. Taking this as an invitation, I brought my hand up and wrapped it around her ample breast. Her mouth opened slightly and her tongue began to tease my lip. Opening my mouth, I let her in, our tongues intertwining with one another in a forbidden, taboo kiss. We carried on for a few moments, before pulling back for some air.

'You've got no idea how long I've wanted to do that' I gasped as I continued to play with her tit through her dress. Her wig had come off long ago and was somewhere in the hall.

'I didn't know I wanted to do that until I saw you in the shower,' she whispered back, 'but I'm glad I did.'

'Me too Mum', I agreed, leaning in for another kiss.

She held out her finger and placed it on my lips before I could reach her mouth. 'Nuh uh big boy', she stated matter of factly before adding, 'We both have far too many clothes on to continue.'

Without a second thought, I hastily unbuttoned my shirt, revealing my faint abs and big pecs, both of my nipples sticking straight out of my chest, hard as bullets. I then relaxed and gazed in rapture as my incredibly sexy mother undressed herself in front of my eyes.

Roxanne's POV:

I stared hungrily at my son's newly exposed muscular chest, deliberately putting on a bit of a show for Greg as I undressed myself, leaving me in black laced lingerie and a bra that barely contained my heaving breasts, which Greg was now drinking in with wide eyes and a broad smile. Eager to pick up where we left off and now feeling very horny indeed, I threw myself back onto my son and, pinning him to the bed, began to kiss him whilst grinding our crotches together and running my hands over his muscular chest. He responded equally enthusiastically, clamping onto both of my breasts, and teasing my tongue with his as our open-mouthed kiss became increasingly lustful.

Breaking the kiss, I rolled off him, his hands sliding away from my boobs. My hands stopped playing with his pecs and I began to run them down his chest. Realising my intention, my son raised his hips slightly, allowing me to pull his boxers off and slide them down his legs, where they joined the rest of our clothes on the floor. Released from the confines of his pants, his cock had been pulled back with his boxers but now bounced back and hit his abs with a resounding clap. I stared at it in awe. It had looked big when I had seen it briefly in the shower earlier this morning, but it truly was huge.

'Like what you see Mum' Greg asked me, smirking slightly.

'H-How big is it?' I asked hoarsely.

'11 inches' he replied, still smirking.

'Holy shit!' I exclaimed, before briefly meeting his eyes. In that second, an understanding passed between the two of us, he knew that I was proud of him and he knew exactly how I was going to show him that fact. Without another thought, I dropped lower on the bed and, to horny to bother with foreplay, took as much of his cock as I could down my throat.

Greg's POV:

I groaned as Mum deepthroated a good 7 inches of my aching penis, my hips bucking involuntarily, causing her to gag slightly as another few inches were shoved down her throat. I continued to lie back on the bed as she worshipped my cock for a good few minutes, moving between deepthroating as much as she could and teasing my crown with her tongue. I was now producing more pre-cum than I had ever done in my life and it was mixing with Mum's saliva and dripping down my shaft before pooling around my balls, some of it dripping onto the bed. My mind snapped back to attention and I let out a loud groan as Mum drove my dick down her throat again. At this rate I wasn't going to last very long at all.

As if sensing my discomfort, Mum suddenly pulled up and released my cock from her mouth, allowing it to smack back onto my stomach. Before I could open my mouth to complain, my Mum began to bathe my spunk loaded balls with her tongue. I always kept my pubes completely shaved so she had full access and boy was she using it. She completely enveloped one of my balls, placing inside her warm mouth, before doing the same to the other, all the while jerking my lubed-up cock, her hand acting as a replacement for her mouth. The next time she came up for air, I grabbed her and pulled her back up towards my face, leaning in to engage in another taboo kiss.

Breaking free from her tongue's attack, I grinned and stated, 'You're still overdressed Mum'.

Reaching behind her back and unclasping her bra, allowing her tits to swing freely she asked, 'This better for you, you hung stud?', smiling just as broadly as me.

'Not quite', I replied, reaching between our bodies, and pulling her soaked panties down to her knees, before allowing her to remove them the rest of the way, before tossing both bra and panties off the bed to join the rest of the clothes.

Deciding that Mum had had her fun with my body and it was my turn to have fun with hers, I used the strength in my upper body to roll us over, so that I was now on top of her. Laughing loudly at the look of surprise on her face, I shuffled down the bed, before grabbing her by the thighs and forcing them apart. I was slightly nervous, as I'd only ever seen this done in porn and had never tried it with a girl. Deciding to just go for I placed my mouth on my Mum's shaven entrance and, taking a deep breath, inserted my tongue.

Roxanne's POV:

I closed my eyes in pure bliss as my son assaulted my sopping wet puss with his tongue. Although he was inexperienced, he was making up for it with pure, unbridled enthusiasm. I squirmed as he brushed a particularly sensitive spot, then moaned loudly when he began to tease my clit, sliding a finger into my now vacated snatch. Suddenly, I felt his finger leave me, and his tongue stop beating a rhythm out on my clit. I thrust my vagina up towards him, causing him to chuckle. I glared at his face, stained with the juice of my arousal, and then flicked my eyes back down to my cunt, demanding he carry on with his work.

'Don't worry Mum, I'm going to get straight back to it,' Greg stated, 'I just needed a breather. At least I know I don't need to be worried about not doing it right.' He said, chuckling again.

Frustrated at his lack of urgency, I reached up, my fingers winding into his hair, before yanking him back down to my twat. Without a second thought, he restarted his assault with added ferocity, forcing his tongue even deeper, before adding not one, or two, but three fingers, causing my insides to clench with pleasure and another moan to escape me. Unable to control myself, I locked my legs around Greg's head and, as he continued to pummel me with three fingers and a tongue, I edged closer and closer to orgasm. One final caress of my clit was all it took, as I gushed all over my son's face and his bedsheets.

He pulled back, grinning like Chesire cat, before wiping his face with his hand and then sticking his fingers in his mouth, savouring the taste of my cum. I grinned back, before sitting up and kissing him hard. As we kissed, our bodies ground together, my breasts squished against his chiselled chest, and one of our hands on the others ass, holding us together. Suddenly, I felt his stiff rod brush against the lips of my pussy, causing us both to open our eyes. We broke apart and he looked at me, his eyes full of love, silently asking the question we'd been leading up to all evening. Lying back down, I respread my legs and, grabbing his throbbing prick, guided it to my entrance. Looking him dead in the eyes, I saw, for the first time tonight, a hint of fear.

'Greg,' I whispered, placing my hand on his cheek, 'I love you.'

'Love you too Mum,' he whispered back.

'Right then,' I said, my lust hitting its peak and my volume increasing, 'Fuck me with that big piece of meat.'

Spitting on his hand, Greg lubed his cock up again, before wrapping his hand around the shaft and guiding it towards my waiting hole.

Sorry about the cliff-hanger. The scene is just split up otherwise the chapter would go on forever. I'll have the next part ready as soon as possible.

Reviews are welcome as always :)