The afternoon sun was slowly setting on the horizon as Kelly and Rob walked along holding hands, nonchalantly making their way back to their hotel room. Strolling along in silence memories of Kelly's afternoon gangbang, with Collette, were still very much in the forefront of both their minds.
"What would you like to do tonight baby? It is our last night." Kelly asked finally breaking the silence between them.
Rob stopped and pursed his lips, thinking for a moment, before answering.
"Tonight, you're definitely mine. We spent our first night here together and I want us to spend some time tonight being together. Maybe having a romantic meal."
Kelly beamed at him with obvious delight "Oh baby really? That would be perfect. Thank you."
"Want to get a drink?" her son grinned back at her, delighted he had made his mother happy.
"Mmhhmm.... That would be nice."
Finding a beach bar, a little further along they decided to stop, Kelly seating herself at a table while Rob went to the counter to get two cold beers.
"How are you feeling mu.... Kell?" he enquired as he joined her with their drinks.
"You mean after this afternoon at the beach and taking on so many men?" Kelly took a long draught of her beer before answering his question.
"Mmhhmm..." her son affirmed doing likewise with his own drink.
"Just how many men did fuck me? I lost count." She asked coyly.
Rob shook his head "To be honest I've no idea but I reckon that you both took at least a dozen pricks in each of your pussies."
"Oh god really?" she giggled naughtily, "I feel like a complete slut for doing it but I absolutely loved it. I loved doing it for you and I loved being used by them."
"Are you sure? I mean you've done so much this week. I thought maybe you would end up hating me."
"No honey I would never hate you." Kelly smiled, "And yes I'm very sure. You've woken up a side of me that I didn't know existed. I want to carry on being your whore if you want me to."
Rob finished his beer, "You know I do. You're everything I could ever desire in a girlfriend."
His mother blushed and took a last mouthful from her bottle before the pair of them got up to finish their walk back to the hotel.
Strolling along hand-in-hand they didn't talk, spending the ten minutes or so thinking back over their experiences of the past few days.
"We need to put some of our stuff in the cases" Kelly suggested when they got back to their room, "We won't have a lot of time tomorrow morning."
"Agreed." Rob sighed looking around disconsolately at the clothes and others items he had left strewn about.
His mother laughed at his rather forlorn expression "It's not my fault you're such a messy bugger."
"I'm a teenager. It's my job." He grinned back at her as he started picking up his things.
"Don't forget to keep back whatever you want for tonight and the morning." She reminded him starting to pack.
For the next hour or so they concentrated on packing their things for the trip home, leaving out just the clothes and toiletries they needed for the evening and the journey home.
Finally, she took a moment to look around the room and, satisfied she had put everything she possibly could in her suitcase, Kelly peeled off her bikini.
"I'm going to take a shower honey." She informed him with a grin stepping completely nude, into the bathroom leaving her son to finish his tidying.
Turning on the water Kelly had just got in when an equally naked Rob joined her under the shower.
"Jesus Christ, someone's bloody horny.... again." Kelly sighed contentedly as her son pulled her back into his arms, his erect cock pressing between her firm buttocks.
Pushing her hair aside Rob nuzzled her neck, gently biting her ear lobes and making his mother shiver with delight as little ripples of arousal began to course through her well used body.
"Aren't you ever satisfied?" she giggled wriggling her backside against him and feeling his prick grow even harder in response.
"Not when you're around without your clothes on." He laughed and turned her around to face him.
Kelly gazed up at her son and slid her arms about his neck pulling his mouth down to hers. Their lips met and she closed her eyes as he immediately searched for her tongue with his own.
"Mmmmmmmmmmm!" she ran her fingers through his hair as they kissed, pressing her slender frame against his taller muscular body.
As their mouths met his hand slowly caressed up between them and cupped a breast, pinching and rolling her nipple and making her shudder as she moaned softly with pleasure.
"Oh Rob... ohhhhhhhhh!"
Teasing her for a moment he felt her teat firm into a hard nub before switching to her other soft mound and repeating his actions until he had her literally squirming against him, gasping with pleasure.
Stop.... teasing me... I.... I need you.... now." His mother whimpered softly gazing intently into his eyes.
Sliding his hand lower, his fingers tracing lightly across her belly, tickling her belly-button, then gently stroking her hairless mound before they eased between her thighs.
"Ahhhhhh!" she gasped with delight, her legs instantly parting giving him total access to her sex as she leaned back against him, his finger lightly running along the length of her slit.
Enjoying the feel of her slim frame pressed to him he continued to tease her, fanning the flames of her desire as he did so.
"Oh yes Rob.... Yes.... I love you." Kelly trembled, a mixture of her own juices and a variety of men's semen oozing out to lubricate her slit, as her son's digit finally probed between her outer lips and up into her stretched vagina.
Worming first one then a second finger knuckle deep into his mother's hot pussy Rob held her against him as she writhed and caught her breath, her pleasure growing with every second.
"Please Rob... please.... Don't tease me... I need you inside me." She begged softly as he finger fucked her.
Pulling his digits out of his mother's dripping slit Rob offered them to her to lick and stared down at her as she sensually ran her tongue along his sticky fingers.
Waiting until she had lapped them clean, he spun her around and pushed her forwards so he had her bent over at the waist, leaning against the wall, before nudging her feet apart.
"Oh god, fuck me baby." She sighed, barely having time to brace her hands against the tiles before her son drove his shaft all the way up into her cunt.