Sandy's Birthday Treat

by D A Porter

Caution: This Erotica Sex Story contains strong sexual content, including Ma/Fa, Fa/Fa, Mult, Consensual, Romantic, BiSexual, Heterosexual, Incest, Sister, InLaws, Group Sex, Oral Sex, Anal Sex, .

Desc: Erotica Sex Story: Bill gives is wife a special treat for her birthday, her sister.

I had a special treat planned for my wife Sandy on her birthday. She'd been feeling just a little blue lately and I wanted to do something special for my lady. I knew what would cheer her up.
She missed her family ever since we had moved to Tucson from Scottsbluff, Nebraska but lately her homesickness had been stronger than usual.

I had called up her kid sister Robin and invited her to come stay with us for the summer. Robin agreed to keep the impending visit a surprise, and I had sent her a plane ticket. Today was the big day

Sandy was sitting in the living room reading the manuscript for my latest try at writing a novel.
The phone rang. "I'll get it!" I called out.
"OK Hon. " she replied.
I picked up the receiver. "Hello?"
"Hi Bill! I'm at the airport now. As soon as I get my bags, I'll catch a cab right over. "
"Massive cool. She doesn't suspect a thing. "
"Sweet. I'll see you in about an hour. "
I hung up the phone and went back into the living room.

"Who was that?" Sandy wanted to know.
"Just an old buddy calling to let me know he was in town. "
She went back to reading the manuscript. She wasn't making a lot of notes in the margins this time, and seemed absorbed in the story. Maybe I had finally gotten it right this time.

I settled down on the couch and watched Sandy read. My wife is always worth watching. A 25-year-old strawberry blonde with medium small tits and grass green eyes in the face of an angel.
I still don't know why she fell in love with an ugly old dude like me, but I ain't about to question my incredible luck.

I looked at my watch, still a good 3/4 hour to go.
We hadn't seen Robin since she was about 12, and that was 6 years ago. I would have taken Sandy up to see her family long ago, but she loathed her step dad, and she never had gotten along with her mother. Robin was the only one out of the family that she truly cared about. She had been devastated when we had to leave her kid sister behind.
I found myself wondering what Robin looked like now. Last time we had seen her, she was all scrawny limbs and a mop of unruly bright red hair.

The time seemed to crawl until I finally heard a car pull up in the driveway. Sandy was still engrossed in the story, and didn't even look up. I went to the door and opened it quietly. I don't know what I was expecting, but it sure wasn't this vision of beauty that was now walking up the steps.
Long red hair, creamy white complexion and a magnificent set of tits that were obviously unfettered by a bra to judge from the way they bounced and swayed as she moved. A flat waist and long shapely legs displayed by a super tight pair of denim cutoff shorts.

"Robin?" I asked, stunned.
"The one and only. " she said with a happy grin.
"Thank you God. "
"What was that?" She asked.
Oh shit, I hadn't meant to say that aloud.
"Never mind. Come on in. " I took her bags and ushered her inside.
She stopped in the doorway to give me a quick hug and a kiss. "Thank you!" she whispered in my ear.

I put her suitcases down in the hall and followed her into the living room. She stood there waiting for her sister to look up.
"Who was that?" Sandy asked distractedly.
"Its just me. " said Robin. Sandy's head snapped around and her eyes went wide. "ROBIN!" she whooped and flung herself out of her chair to wrap her arms around her kid sister in a hug so tight it must have made the younger girl's ribs creak. "How did you get here? How long are you going to stay? WHY DIDN'T YOU LET ME KNOW YOU WERE COMING?" Sandy was babbling out questions so fast that Robin didn't have a chance to answer.

"Happy birthday my love. " I said.

Sandy didn't hear me; she was too busy trying to cram 6 years of catching up into about 6 minutes of talking. I shook my head and left the room.
I carried Robin's bags up to the guest room across the hallway from our bedroom. It had it's own bath and a nice view of Mount Lemmon. Robin should find it comfortable enough.
When I got back downstairs, the girls were still chattering away like a couple of magpies. I decided to let them have some time together alone and left to pick up robin's little surprise.

When I got home, Sandy was in the living room with the manuscript again. "Hi sweetie. " I said. "I hope you like your birthday surprise. "
Sandy stood up and laid the manuscript on the coffee table. "Have I told you today that I love you?" she asked as she snuggled into my arms.
"I think so, but tell me again. " I quipped. Instead she fastened her mouth to mine with a fierce hunger that I hadn't seen in quite a while.
"You'll get your reward tonight in bed. " she promised me as she pushed her groin against mine.
I rubbed my hands up and down her back in the way she liked to be caressed. "I'm glad I could make you happy again. " I said.
She laid her cheek against my shoulder and sighed. "I'm always happiest with you around. " she murmured.
"Where is our houseguest?" I asked.
"She's up taking a shower. " Sandy replied. "I told her that we'd take her out to dinner tonight. "
"I already have reservations. " I told her.

She squeezed me again and then turned back to the chair and the manuscript.
"How do you like it so far?" I wanted to know.
"I keep getting caught up in the story line and forget to look for errors. " she admitted.
I felt just a little smug. Fort once, Murphy's Law seemed to be leaving me alone for a while.
"Robin will like this too. " Sandy said suddenly. "I'll have her read it tonight while we're, ummm, busy. "
I grinned. "Sounds great my love. "

If it sounds like I am still infatuated with my wife, you're right. I am. And proud of it.
I sat on the couch again and propped my legs up on the coffee table. I opened my laptop and started another story line.

I looked up when Robin came into the living room. She was fresh from her shower and wore only a knee length terry robe and a towel around her hair.
"Sandy," she said. "I can't find the blow dryer. "
"Check the bathroom in our bedroom and look in the cabinet under the sink. " Sandy told her.
"Hey Robin, " I said before she could leave the room. "I have a little something for you too. Consider it an early Christmas present. " I took a key ring from my pocket and tossed it to her. "That's the house key and the keys to your car. "
"I don't have a car... " she trailed off.

Sandy was smiling at me and I winked at her. "Really? Then whose car is that sitting out in the driveway?" I asked Robin.
She went to the front door and looked. "No way!" She shrieked. Then she came tearing back into the living room to practically tackle me with a hug. "Thank you!" she said over and over again as she peppered my face with kisses.
Sandy's curiosity got the better of her and she went to the front door to have a look for herself.

"Where the hell did you find that?" she asked.
The "that" in question was a 1962 Lincoln Town Car convertible.

"Remember Dale?" I asked. She nodded.
"Dale just finished restoring it. I traded him that old 'Vette that I have been wasting so much time on. "

Robin had climbed off me by then and was headed for the door, intent on a closer examination of her new toy.
"Um, sis," said Sandy, "You might want to retie your robe or put some clothes on before you go out there. "
Robin looked down and realized that her robe was completely open, giving me a fine view. She wrapped her robe shut and retied the belt, and then she sped upstairs to get dressed.

"Every time I think you can't surprise me anymore," Sandy said as she eased onto my lap," you come along and show me something new. "
About then Robin zoomed out the door wearing another set of daisy dukes and a tank top. Sandy leaned against me and laughed. "She'll be useless for an hour or two. "

We heard the car start up and pull out of the driveway. I slipped my hand up under Sandy's shirt and tweaked her nipple. "How about a quickie while your sister's otherwise occupied?"

My wife dragged me to my feet and into the kitchen. "The hell with the bedroom. " she declared. Then she sank to her knees and unzipped my pants. Taking my cock out of my shorts, she took it deep into her mouth and started nursing on it like a baby with a pacifier. As my cock quickly grew to full erection, she started bobbing her head back and forth, pumping her hands along the shaft with a twisting, spiral motion, occasionally taking nearly all of my 7 1/2 inches deep into her throat. I caressed her hair as she worked. Then she pulled her head back and stood up suddenly. She undid her shorts and pushed them to the floor along with her panties. She turned and bent over the table. "Now. " she said urgently. "Please. "

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