With seventeen-year-old Ian Patterson having cum on the bare arse of his twenty-year-old sister Sharon and causing her orgasm in the process, both siblings knew that further involvement was likely and desired.

Over the next few days, they often had eye contact and Sharon would sometimes tease Ian by sticking her backside out as he went past or Ian would touch one of her buttocks as he moved behind her.

They both knew that they should not be having such thoughts but both longed to get with the other sexually.

Their parents, Michael and Jane, were going to the wedding of an ex-work colleague of Jane's and us it was quite some distance from their home they were going to stay overnight at a hotel after the wedding.

Ian and Sharon were almost counting down the hours until they would be alone in the house and when the day dawned Jane said, "You two behave yourselves."

With a smile at her brother, Sharon said, "Don't worry, mum, I will look after him."

As they were standing at the door seeing their parents off Ian had his right hand on Sharon's backside and as soon as the door was closed, she turned and planted a long lingering kiss on his lips.

"You and I are going to have such fun, dear brother," she said.

"I love you, Sharon, and I love your bum."

"Well you certainly love my bum... you will be seeing plenty of it."

"Um, Sharon, um I have never..."

"You have never what, my gorgeous brother.?"

"You know, I have never um... with a girl."

"Don't worry I told mum that I would look after you and I will," she said as she undid his trousers.

She soon had his rigid cock in her hand. "You are going to fuck your sister but first I am going to blow you," and she dropped to her knees and took him in her mouth.

He closed his eyes and threw his head back as she worked her magic with her lips and tongue. "Oh, Sharon, I am going to cum soon."

She took her mouth off him long enough to say, "Cum in my mouth," and she was then back to sucking.

Ian's body tensed and the spunk shot into his sister's throat.

As she smiled up at him, licking her lips, he said, "That was fucking amazing."

"There is going to be a lot of amazing today, darling Ian."

Ian was still coming down from the blowjob when Sharon said, "Let's go upstairs."

His prick had deflated but when his sister turned and lowered her trousers the sight of her knicker covered arse caused him to start to stiffen again.

He moved behind her and rubbed against her buttocks with hands and cock as he kissed her kneck.

"Ummm we are going to have such a fuck," she said as she led the way to the stairs.

She deliberately swung her hips as she climbed the stairs with her brother's eyes fixed on her buttocks.

Before climbing the stairs, Ian scrambled out of his trousers and pants which had been halfway down his legs so he was now naked from the waist down.

On reaching the door to her bedroom, Sharon turned to face him and they again kissed as she stroked his cock and he put his hands on her buttocks.

"Once we go through this door, there is no going back, you know," she said.

"I know. I want you."

They went into her room and she breathed, "Take my knickers off," and, as she had her back to him, he again bared her buttocks.

"Kiss my arse, Ian," she instructed although it was more an invitation than an order.

Ian kissed each of the globes and then put his tongue to her arse crack and licked the length of it "Fucking hell, Ian, that feels good."

She turned so that he was now looking at her hairy cunt for the first time because when he had cum on her arse before he only saw her from the back.

Whilst he was taking in this new delight, she removed her blouse and bra so now his twenty-year-old sister was before him in all her naked glory.

Ian got to his feet and Sharon removed his T-shirt so now he too was naked and the siblings had a long deep kiss and exchanged tongues.

She moved backwards to her bed with his erect cock in her right hand and she slowly lay back on the bed and guided his prick to her pulsing cunt. He felt the thrill of entering a female's body for the first time and he slowly started to rock backwards and forwards.

"That's it, sweetheart, fuck your sister."

The two of them increased the pace with her thrusting back against him and they both started to feel approaching climaxes.

"Faster, Ian, make me cum," she panted and her brother increased the pace.

"Sharon I am going to..." but he was cut short by his sister squealing in pleasure as she orgasmed.

Feeling proud that he had made his sister cum he flooded her insides with his sperm.

As they came down they laughed and kissed and caressed.

Later, she lay face down on the bed purring as her brother gave her nether regions a thorough examination with his lips, tongue and fingers.

Sharon then rode him with her tits swinging until they both came and later still, Ian had his first-ever sixty-nine.

In the morning, Sharon was on her knees on the bed and Ian gazed at her wonderful arse before sliding his erect prick into her glistening twat and giving his sister another fucking.

Later that day, their parents returned and the siblings tried very hard for their internal glowing not to be obvious.

Now that Sharon and Ian had had their one night of passion, they were wanting more but for now, they had to be content with thinking of each other as they masturbated and the occasional hand on buttock when nobody was looking.