Sarah and I had been married for 8 years, we have two beautiful daughters and I like to think we have a happy marriage.
Sarah was one of two girls whose mother had raised mostly alone. After Cheryl, Sarah's younger sister, was born their dad walked out on them never to be seen again.
Maureen, my mother in law, had worked hard bringing them up and in my opinion she had done a great job under difficult circumstances.
Let me describe Sarah, she's 5 foot 5 tall, long dark hair, 34b cup size, A little plump after having the girls, not a super model but I love her with all of my heart.
Our sex life is unbelievable, other than the girls bedrooms we have made love in every room of the house, including the back garden! Sarah has always been sexually spontaneous, we could be in the kitchen and she would want sex, driving home, even in the loft on one occasion!
Back to the story, Maureen had not had a holiday since her husband had walked away.
One Friday evening we received a phone call, Maureen had won a 3 month all expenses paid cruise!
Her only problem was Cheryl who she wouldn't leave at home, Maureen didn't trust her for that long. Cheryl can be very immature.
So the question was could she please stay with us?
Sarah and I discussed it and agreed that she could.
We rang Maureen and told her she was grateful but sad that she would miss Cheryl's birthday the first week she was away, we promised she would have a great birthday.
I'll fast forward to the day Cheryl arrived, Sarah and I had sex first thing in the morning, Sarah wanted doggy style and every time I got close to orgasm she would make me stop so that I lasted longer.
Afterwards we both said that the next 3 months were going to be the longest ever.
I was always amazed at how similar Sarah and Cheryl looked, Cheryl looked like a younger version of Sarah, with the same facial features but she had short light brown hair, at least 3 inches taller and was definitely much bigger in the boob department.
That first Saturday we spent having fun with our girls who adored their aunt "Cherry".
The first few sex less days flew by and I found it increasingly difficult around Cheryl.
In the mornings and most evenings she would wander around the house in a short silky dressing gown that left very little to the imagination.
On the morning of Cheryl's birthday she came down stairs in the dressing gown. Sarah, the girls and I were in the kitchen/ dinning room, as she came in the girls ran at her to wish her happy birthday, as our youngest put her arms up she lifted one of the gowns flaps and I was treated to a view of her shaven pussy which she failed to notice, it dropped back into place as she lifted Paige up but I had seen plenty.
Sarah always kept herself natural but trimmed and I have to say that Cheryl's shaven pussy looked good enough to eat.
Sarah and I stood up to wish her a happy birthday and after putting Paige down Sarah hugged her and I held my arms out to her and she pushed herself against me I was going kiss her on the cheek but Cheryl kissed me on the lips.
"Thank you Jon." she said.
"Your most welcome." I replied and kissed her again.
It could have been my imagination but that hug lasted a lot longer than usual.
We all sat at the table and I asked her how she wanted to celebrate.
"I don't know." Typical teen!
"How's this, why don't you and Sarah go shopping, buy you something nice and pretty to wear, then we'll have a little party for you when the girls get back from school and then the 3 of us can get silly drunk tonight, how's that for a plan?" I suggested.
"Sounds great." Cheryl replied enthusiastically and Sarah agreed.
I had taken the week off work just in case there were any problems so I was performing the school runs for the girls.
I returned home and was relaxing when Sarah started to mess around play fighting, this soon descended into a tickling match, before I knew what was happening Cheryl had joined in.
Now, I'm no whimp but when I'm tickled I am almost defenceless, soon the two of them had me pinned down and I was laughing like a loon, I was doing my best to defend myself but they had the upper hand. Things started to get risky when I felt Sarah fondle my semi hard dick through my trousers. I wondered why she would tease me like this knowing that we would hardly get a chance for sex.
"Come on you two leave me alone and go shopping." thankfully they let me go.
"Ah so you admit defeat!" Sarah looked triumphant.
"OK, OK I give in!"
They both got ready and left.
I puttered about the house getting ready for the little party we had planned, inflating balloons, putting up decorations, the usual stuff.
About an hour later my mobile pinged and I opened a text from Sarah asking if she could spend £50 on Cheryl.
I replied "Why not, Next time you attack me with your sister, please don't grab my cock, I'm as randy as hell!"
Sarah replied "Not me! Dirty little cow, wait till she comes out of the changing room"
I replied jokingly "Don't be hard on her, that could be her birthday treat from me"
She didn't reply to that which had me a little worried.
I finished the preparations and sat drinking coffee when they returned. Cheryl went straight up to her room and Sarah came over and kissed me.
"You OK?" I asked waiting for her reaction.
"Yes, she apologised for groping you."
"I thought you may have murdered her?"
"Nahhh, as kids we shared our toys so I'm OK with it."
Saying that she got up and went into the kitchen leaving me with my mouth hanging open.
I followed her but before I could ask her what she meant Cheryl came into the kitchen in a new dress.
"What do you think?" she asked.
"Very nice Cherry!" Sarah enthused.
She was wearing a pale blue low cut dress that showed lots of cleavage and leg.
"Give us a twirl." Sarah instructed.
As Cheryl did the dress lifted I got yet another view of her naked pussy and ass.
"Looks great." Sarah said not reacting to the fact that her sister had no knickers on, I stood with my back to the long dinning table and perched on it.
"Great I'll show you the other one." Cheryl ran upstairs.
"What the hell is going on Sarah?." I asked keeping my voice low.
"She's flirting with you, just enjoy it you old stick in the mud." she leaned towards me and kissed me.
Cheryl came down stairs in a skirt that was little more than a belt, it only just covered her and a boob tube top that she filled beautifully.
"What about this one?" she asked us.
"Now that is sexy." Sarah said.
She did look fantastic but the outline of her bra ruined the look. By now I thought that I could play this game as well.
"Very sexy, turn around and let's see."
Sarah glanced at me but Cheryl slowly turned around.
"Wow! You look great, but if you don't mind me saying, if your going out in that outfit you need to ditch your bra and get one of those support cup bra things Sarah has."
"Oh yes!" Sarah said "I should have got one for you, mine will be far too small."
