Grandma's Secret - Cover

Grandma's Secret

Copyright© 2025 by SquattingEagle

Chapter 5

Incest Sex Story: Chapter 5 - Brother and sister stumble on their dead grandmother's diary and start reading it. Grandma's life was interesting to say the least and it opens the door to a more intimate relationship between the siblings.

Caution: This Incest Sex Story contains strong sexual content, including Ma/Fa   Consensual   Fiction   Incest   Brother   Sister   Oral Sex   Pregnancy  

Saturday

The next morning, I woke up first, feeling better than I ever had. When I opened my eyes, the first thing I saw was my sister’s beautiful face, still sleeping peacefully. She looked like an auburn-haired angel in the morning sun. I watched her delicate features and listened to her steady breathing while she slept. Finally, she opened her eyes and smiled.

“Hey,” I said.

“Hey.”

“Did you sleep well?”

“Hmmm,” she smiled. Her hand reached for mine, and our fingers intertwined. “I like sleeping with you. I dreamed of you. It was nice.”

She pulled my face to hers and gave me a kiss.

“Do you know what time it is?” she asked.

“Just after ten.”

She groaned unhappily. “We’ve got to get up.”

We showered separately, still a little cautious after last night’s narrow escape. Audrey went first, and then I took my turn. When I got back in our bedroom, she was sitting on the bed, reading the diary. She was leaning against the wall, still dressed in only her bathrobe, and her hand was between her legs.

“Mom and Dad are gone,” she said as she saw me. “We’re all alone. I was waiting for you.”

“Were you playing with yourself?” I asked.

“Maybe,” she said with a naughty smile.

I pulled her hand from between her legs and put my fingers in my mouth. It tasted deliciously of pussy.

“I think you’re hiding candy under your robe. Your fingers are all sticky.”

“Why don’t you find out for yourself?” she said, giving me that smile again.

I flipped her onto the bed and was immediately greeted by a naked and very aroused pussy.

“There is some tasty candy,” I said. “Is there enough for me too?”

“It’s all for you,” Audrey giggled.

It was the invitation I was waiting for, and I lowered my head until my lips touched her stomach. From there, I kissed my way to her freshly shaven mound, then past her pussy and down her thighs. Twice more, I passed the moist lips as I nibbled and kissed the inside of her legs before I suddenly dragged my tongue all the way over her seething slit and rolled the tip around the little nub of her clit. She inhaled sharply as my finger penetrated her. I moved my finger in and out and licked her at the same time. Soon, she was moaning softly, and her hands on my head told me she was ready for more.

I pulled her further down on the bed and crawled between her legs. Because of the way she lay, her pussy was an open target, and the tip of my cock slid smoothly between her slick labia.

“Wait,” she whispered as I was about to enter her.

“What?”

“Do you want to fuck now, or shall I read to you the story of when Mom first had sex with her father?”

My cock was already about to blow. As much as I wanted to learn more about Mom’s naughty secret, there really was no choice for me. I pushed my hips forward and penetrated my sister while I visualized our teenaged mother losing her virginity to her father. We fucked savagely, grunting and moaning as we raced towards orgasm.

It was a quick and desperate shag, and I don’t know which one of us came first. I just remember blasting off in her convulsing pussy as she was biting my lip hard enough to draw blood.

As soon as the lightness in our heads cleared, Audrey crawled back up the bed and opened the diary again. I lay behind her, looking over her shoulder and listening to the story.

“This morning, as Charles walked out of the kitchen, I saw Donna staring at his ass. She caught me looking at her and sighed, smiling hopelessly. She was still very much in love with her father. Then a tear grew in her eye and I could see she was about to have another breakdown. I pulled her into my lap and told her I was going to arrange for her to have sex with Charles tonight, if she still wanted. Her reaction was beautiful, her eyes got big and a smile formed on her lips. The gloom and listlessness instantly vanished from her and I had my old daughter back. She asked if I was serious and I promised her I was. She hugged me and kissed me, telling me she didn’t know how to ever thank me.

“I handed her my sheer negligee and told her to put it on and come to my bedroom at exactly eleven o’clock. She asked me if I would be there too. I said I hadn’t planned on it, but she asked me to stay. I said that if she wanted it, that I’d be there. I just hope it won’t be too hard to watch Charles make love with another woman.

“I still have to think of a way to get Charles ready. A few days after Donna’s confession, while we were making love, I tried a little roleplaying and started calling Charles ‘daddy’. It made him more aroused than ever, and he even called me ‘Donna’ as he came inside me. He has always been a good husband and a good father, but there’s no denying he wants her almost just as much as she wants him. But while Donna desired nothing more than to give herself to Charles, he might need a little encouragement. If I played things right, he would surely be willing to take her.

I don’t know yet how I will do that, but it will be one hell of a surprise for him.”

“Dear diary,

“Everything went perfectly! I had not told Charles anything about my plan, but he played his role beautifully. Of course, he noticed I was more excited than usual, but he didn’t know the true reason. He just let me drag him to the bedroom and tear off his clothes. I kneeled between his legs and began to massage his cock to hardness. My timing was perfect. At eleven o’clock, I had him close to ejaculating when I heard Donna’s footsteps in the hall. In just a few moments, she’d come in through the door. I got up and waited by the door, leaving Charles naked and erect.

“As he sat there on the bed alone, he looked at me and asked me what I was doing. I told him to relax and enjoy the surprise I had for him. Then, the door opened, and Donna came in, wearing nothing but my negligee. The lamp in the hallway lit up the sheer fabric and gave her an ethereal aura, like a nymph or perhaps an angel.

Donna’s young, flawless body filled the delicate garment better and more beautifully than mine had ever done. She was excited, with a light flush on her face and chest and puckered-up nipples, hard like little pink bullets. I took her hand and led her into the room. She walked confidently towards her father, seductively swaying her hips as she moved.”

“Charles looked at me in astonishment. He couldn’t believe the surprise I promised him was our own virgin daughter. I let go of her hand, and she sat down in her father’s lap. She kissed him on his lips and told him that she loved him and wanted him to be her first lover. He looked at Donna again and back to me, his eyes now asking for permission to go ahead. He’s so sweet, I honestly believe he would have rejected Donna if he thought I wasn’t a hundred percent okay with it. I nodded again and blew him a kiss. Taking this encouragement, he took our daughter in his arms and untied the negligee. The silk garb fell off her shoulders and floated to the ground, leaving Donna as naked as the day she was born.

“She was nothing like that little baby girl anymore. Now she was endowed with a pair of gorgeous round breasts, a slim waist, and curvaceous hips. Donna was a full-grown woman now, ready for her first man. I could tell Charles was liking what he saw. His big cock was obscenely erect, throbbing against our daughter’s stomach as he grabbed her and kissed her on the lips. She eagerly kissed him back, with pure sexual hunger.

“Without wasting another second, Charles lifted our daughter in his arms and tenderly laid her down on the bed. By instinct, she spread her legs and raised her knees, giving her father full access to her dripping wet pussy.

He got on his knees and moved over her. He kissed her breasts and then her stomach. Her nubile body shook as his fingers tickled her sides on his way down. Then her eyes got big, and she gasped as Charles kissed her between the legs. Like no other, I know the wonderful things Charles can do with his mouth, and I could see its effect wasn’t lost on Donna either.

“As he licked her lips and suckled on her clit, I saw the look of surprise on our daughter’s face change into lust and then almost pain as she approached orgasm. There was a moment I felt a touch of jealousy creeping up on me. At first I thought it was because of Donna, who was tasting the pleasure that had been exclusively mine, but if I am honest, the one I really envied was Charles, nibbling on that delectable virgin pussy.

“Within minutes, Donna was hit hard with a first orgasm. Her fists were clenching handfuls of her lover’s hair as she kept him trapped between her legs. Though he may have had some difficulties breathing, Charles’ mouth stayed locked on her sex while she lay shuddering on the mattress. She seemed to climax forever, but eventually the convulsions lessened until they were nothing but shivers.

“Charles got on his knees and crawled between our daughter’s wide-open legs. He lifted her knees a bit and positioned himself on top of her. Before he made his move, he asked if she was ready. Donna nodded. She was a little scared, but determined to go ahead.

“Now that he had her permission, he grabbed his fat cock and rubbed it up and down her pussy a few times. Then he aimed the tip at her entrance and began to push in. I could see Donna brace herself as her father slowly increased the pressure. Then I saw and heard her wince as the blunt head of her father’s penis broke her cherry.

“Charles was a lot more gentle and careful than Donald had been with me. After this first move, he allowed some time for Donna’s vagina to accommodate his invading cock, so it wouldn’t be too painful. After a while, she whispered that she was okay, and Charles slowly fed her another few inches. Soon he was almost all the way inside her.”

 
There is more of this chapter...
The source of this story is Storiesonline

To read the complete story you need to be logged in:
Log In or
Register for a Free account (Why register?)

Get No-Registration Temporary Access*

* Allows you 3 stories to read in 24 hours.

 

WARNING! ADULT CONTENT...

Storiesonline is for adult entertainment only. By accessing this site you declare that you are of legal age and that you agree with our Terms of Service and Privacy Policy.


Log In