It was my eighteenth birthday and here I sat twiddling my thumbs, I should have been having a party, but mum couldn't afford it. I should have been going out, but I couldn't afford it. My not so little sister and mum had vanished into the kitchen nearly an hour before to cook up a birthday surprise, but I felt so frustrated that I was not looking forward to it. Things had gone downhill, money-wise, since dad had walked out six months ago, he'd been in touch just once since he'd left and that had been to pick up some things he had forgotten to take. I suppose that his forgetting my birthday didn't help my mood any either.

Mind you I couldn't blame mum for his departure, in any man's book she was a looker even at forty. Why dad left was known only to him and he wasn't about to talk. My sister, who was a year younger than me, was a younger version of mum, maybe not quite so pretty, but still pleasant to look at. I was a little surprised at the tone of my thoughts towards my mother and sister and could only put it down to the fact that my girlfriend Dawn had not only refused my advances over the past few weeks, but also had finally given me the elbow the night before.

"Happy birthday Mark." My mothers voice said from the living room doorway.

Bringing my thoughts back to the present I looked in her direction and smiled, she'd got herself all dolled up and had changed into her prettiest dress in an effort to cheer me up. Unfortunately the dress was very clingy and cut to reveal lots of leg and cleavage, the effect was to make me feel even more frustrated. Nevertheless I managed to smile cheerfully as she walked into the room with a tray of snacks and sandwiches which she placed on the sideboard, behind her was my sister Candy and like mum she was done up to the nines. She was almost as gorgeous as mum and I felt even worse. Candy was also carrying a tray on which was a cake.

"Happy birthday." She grinned as she came over to where I sat.

It was a nice cake, they must have put a lot of effort into making it and icing it, but I really didn't fancy any of it. All I fancied was a good fuck and that was not on the agenda, not until I could find myself a new and willing girlfriend. Manfully I hid the way I was feeling and enthused over the cake even managing to eat a bit of it after mum had cut me a thick slice. Mum had put the tape player on and soft music filled the room as we ate, she'd also managed to buy a bottle of vodka, although how she had scraped the money together I don't know. We had a few drinks and a laugh; I thought I had been doing a good job of hiding my feelings when my mother suddenly spoke to me.

"You are like a wet floor clothe tonight Mark." She stated, "What's wrong?"

I was stuck for an answer, after all you can't really admit to your mother and sister that you felt so frustrated that you wanted to scream. Well I couldn't anyway.

"Is it because your father hasn't contacted you to wish you a happy birthday?" She suggested.

"Yes," I replied snatching at the excuse, "that's it."

Mum gave that look of hers that told me that she knew I wasn't being 'honest' then smiled.

"Come on," she said as she stood up, "come and have a dance with your old mum."

"You're not old." I laughed as I joined her at the centre of the room.

The music she had chosen was 'get together' music, slow, dreamy and in a way sensual. With a gay toss of her head my mother came into my arms and we began moving to the soft tones of the music, as we danced I became very aware of her body pressing to mine and felt a little ashamed of the thoughts I was having about that body. When the track ended Candy jumped up and took mum's place, once again I drifted around the room to the soft sounds, once again I enjoyed the feel of a soft female body pressing against mine and once again I felt ashamed of the thoughts I was having towards that body. We stopped at the end of the track for another drink, but as soon as my glass was empty mum grabbed me and pulled me back up to dance. Part way through the track we were dancing to I gave a sigh.

"What is the real problem?" mum whispered in my ear.

"Nothing mum." I lied.

"Don't you nothing me," she whispered back, "I know you and there is definitely something up."

"If you must know Dawn dumped me last night, although she's been rejecting me for a couple of weeks." I whispered back.

"Aah," mum said softly, "and now my little boy is all frustrated. Poor Mark, all hard and nothing to poke."

I leant back and looked at her in amazement, I had never heard my mother speak like this and I must admit I was a little shocked. She grinned at me and I was forced to laugh.

"That's better," she said, "you see, talking about it helps."

"Thanks mum." I grinned and gave her a squeeze.

"All part of the service." She grinned, "Anyway I know exactly how you feel."

"Eh?" I responded brightly.

"You've only gone without for a couple of weeks," she laughed quietly, "I've had to be a 'good' girl since your father left with that little 'girl' of his."

"Why don't you go and have some fun," I grinned back, "I mean if it's good enough for dad it's good enough for you."

"Mark," mum said seriously, "if I tried that your father would make it look as though I was the one that had an affair. No, I don't dare get myself laid until after the divorce is finalised."

My mother's words shook me a little, but I felt even closer to her for them. However, it did nothing to relieve my frustration, just the opposite. As we had talked our bodies had been rubbing closer together and I was stunned to find myself with an erection, I knew it wouldn't be long before mum noticed either.

"I'm flattered." Mum laughed suddenly.

"Why's that?" I asked innocently.

"You have got a hard on from dancing with me and don't you deny it." She grinned up at me.

"Guilty." I grinned, "Anyway, you're gorgeous enough to raise the dead."

"It's not the dead that's being raised, but flattery will get you everywhere." She laughed.

"Hey you two," Candy interrupted us, "the tape ended five minutes ago."

In surprise I looked up, sure enough the tape had run out, mum laughed and made a comment I couldn't quite make out, moved away from me and turned the tape over. As soon as the music started my sister was in my arms.

"It's Randy Candy." I teased her.

I had teased her with that nickname since I had caught her masturbating nearly a year ago; her usual response was to poke her tongue out at me. Only this time her response not only surprised, but also shocked me; I seemed to be getting a lot of shocks that evening.

"As randy as hell" she laughed quietly, "and desperate for a good fuck."

"Candy!" I gasped.

She grinned up at me with that impish look that told me she was winding me up and I had fallen for it, only I wasn't so sure it was all a wind up. Having won the point she settled down to dance, but after a few moments she started to wriggle against me and I knew that she had discovered my erection.

"Who's a big boy then?" she grinned and pressed tighter to me.

"Will you stop that." I laughed, "It's bad enough as it is."

"Poor Mark." She laughed and rubbed herself against me.

At that moment the track ended and I seized the opportunity to have a drink and to cool off. I noticed that mum and Candy were whispering together and I had the horrible feeling that they were comparing notes. As the minutes passed I noticed the pair of them glancing my way with annoying and puzzling frequency, almost as though they were plotting something. Then I saw Candy nod, grin and turn to leave the room. A moment later mum came over to stand beside me; she put an arm around my waist, smiled and held out her empty glass to me, it was obvious she wanted a refill.

"Where's Candy off to?" I asked as I handed her a full glass.

"It's not polite to ask." Mum replied with a wink.

I grinned at her as I assumed that my randy little sister had gone off to bed for a wank.

"Anyway," mum laughed, "you still have me. Let's finish our drink and have another dance."

"Okay." I grinned.

Though still frustrated I was feeling a lot happier, the time spent watching my mother and my sister in their whispered conference had allowed me to cool off a little and my cock was only semi-hard. Draining my glass I took my mother's hand and stepped to the centre of the room, with a smile she moved against me and for a while we just drifted around to the music. As we danced I once more became aware of her body rubbing against me and once again I felt my cock slowly twitching back to erection, despite every mental effort I made to stop its rise.

"What were we talking about before Candy interrupted us?" mum suddenly asked then laughed, "Oh yes, being frustrated."

Her sudden reversion to our early conversation did nothing to ease my discomfort, it was a shock to me to realise that I could get sexually aroused by my mother. It was also a shock to realise that I hardly felt any shame at the thoughts I had about my mother.

"I see I've got you hard again." Mum laughed rubbing herself on my erection.

Her movements were turning me on in a big way and I felt the urge to take her in my arms and kiss her.

"Mum if you don't stop that..."

"What? This?" She grinned rubbing herself on me even more.

"Yes that!" I exploded.

"So what will you do if I don't stop?" She teased.

It was too much, something in me snapped and I wrapped my arms around her, pulled her tighter to me, leant down and kissed her full on the lips. My mother responded to me by melting in my arms, her lips returning my kiss eagerly, almost hungrily and for a moment I forgot it was my mother in my arms. Then I remembered and I felt guilt rise in me, pulling back from my mother I stared at her wide-eyed.

"God I'm sorry mum." I whispered in shame.

"For what?" she breathed.

I couldn't believe what I was hearing, what I had done was wrong, even against the law, yet she seemed unconcerned and I certainly felt turned on by her. It was a dilemma, I was more than tempted to relieve my frustration with my mother and she seemed more than willing to let me, but at the same time I felt disgusted with myself for even considering the idea. Looking down at her smiling face I wondered whether she really was offering what I thought she was offering or was it just some kind of game? If it was a game what were the rules? Her leaning up and kissing me lightly on the lips broke my concentration.

"You think too much." She grinned as our lips parted a few moments later, "So, my randy boy, what were you going to do if I didn't stop?"

Well I certainly couldn't deny that I thought a lot before acting. Nor could I deny that I was as horny as hell and getting hornier as she gently rubbed herself against me. Add to that the fact that I'm only human and can resist temptation only so long and I came to a decision.

"This." I almost whispered.

Raising a hand I gently cupped one of my mother's boobs, a wave of excitement ran through me as I closed my fingers on her supple mound. My mother sighed and pressed her boob into my hand in response to my touch. Bringing my other hand into play I pressed it to her other boob, her response was the same and as I played with her tits over her clothes I felt the guilt at my actions being overwhelmed by the pleasure I received from them. With a sigh my mother kissed me then parted our lips and looked deep into my eyes.

"Pretend" she whispered, "that I'm not your mother. What would you do next?"

Obviously the answer to that was that I would undo her dress, slip it off her and fondle her body. Nervously I reached behind her and opened the zip of her dress then drew the material down her arms. With a saucy wriggle my mother pushed the dress over her hips, it slid to lie around her ankles and with a swift flick of a foot she kicked her dress across the floor. With lust rising in me I gazed at her heavy, bra enclosed boobs then let my eyes rove over her body. My mother stepped back a little to let me inspect her more easily, her eyes sparkling and her lips curved in a sensuous smile.

Then she came close to me, her hands touched my chest, her fingers tugging at the buttons of my shirt, moments later she was pushing my shirt off my shoulders; she tossed it aside then dropped her hands to the waistband of my trousers. Teasingly my mother slowly opened my flies before undoing the button and clip that held my trousers up, as the material of my trousers slid down my legs to bunch around my ankles I felt a moment of indecision, but the moment passed and I kicked my trousers off and out of the way. Reaching out I opened her bra and as I slid the bra off I gazed at her ripe boobs lustfully. Sliding my hands down her sides I hooked my thumbs in her panties and slowly tugged them down at the same time my mother reached out and pushed at my pants. Soon we were naked, once again I let my eyes rove over my mother's body, gazing longingly at her tits, her nipples and her pussy covered in a light down of hair. Raising my eyes I saw my mother staring at my cock with a smile of anticipation on her lips.