Choosing his words carefully to try and minimize the shock his story would surely invoke in the older woman, Robbie first asked Zelda, "Grandma, how do you feel about sexual relations between blood relatives?"
"You mean incest?" she asked, obviously surprised at the question. "I guess I never thought too much about it. I don't suppose there's really any harm in it as long as everyone involved is doing it voluntarily and nobody's forced or anything. Why do you ask?"
"Well, the story I'm about to tell you involves a lot of sexual activity between close family members, including my mother and I. And since incest is illegal and a moral outrage in most of the country, I wanted to be sure you weren't going to run screaming for the authorities or toss me out on my ass "
"You've had sex with your mother?" exclaimed Zelda. "With my daughter? Are you serious?"
But before Robbie could respond, she went on, "I can certainly understand why she'd want to sleep with you, though. Don't worry! I'm not about to call the cops – OR throw you on your ass. I wouldn't want to bruise that cute little tush of yours," she giggled. "I've never been much on religion and even though I never remarried, it certainly wasn't because I'm a prude. And this is a story I really want to hear."
"Well," began Robbie, "I guess I've always kinda had the hots for Mom for as long as I can remember. But I never knew she felt the same way until her wedding day. Mom actually seduced me in the wedding chapel right after the ceremony."
"You're kidding," gushed Zelda. "You mean she actually fucked you right there in the church while her new husband was waiting just outside? Oh, she's my daughter, all right. I can see myself doing the same thing if I ever had the opportunity. 'Course at my age, I doubt that's ever gonna happen. Especially with a handsome, young hunk like you," she grinned.
"I wouldn't be too sure about that," murmured Chet.
"What's that, Dear?" asked Zelda. "Did you say something?"
"Oh, no ma-am," stammered Chet. "Just kinda thinking out loud for a minute. Don't pay me no mind. Go on with your story, Rob."
Robbie went on with the details of the first time he had made love to his gorgeous mother and told Zelda that before he actually fucked Sherrie, she had given him the best blowjob he'd ever had and he'd been equally as generous in eating her pussy."
"Oh, my, Robbie," stammered his grandmother. "I can't believe this. You're making your ol' Gramma hot as hell. Christ! I haven't been this turned on since my own wedding night. But wasn't her husband upset with her spending all that time with you?"
"Yeah, go on Robbie," grinned Chet. "Tell her what your new stepfather was doing while you were balling his bride."
"Shut up, Chet," groused Rob. "I'm telling this story. Just sit there and diddle yourself or something."
"No, Grandma, Don wasn't the least bit upset. He was being well entertained by Chet's luscious sister at the time. Darla was Mom's bridesmaid and, as I found out later, was in on the plot the whole time. She'd been lusting after Don from the first time she met him."
"But that's not the end of the story. Are you sure you want me to continue," he asked.
"Oh, hell yes," said his grandmother. "You mean there's more? Shoot, I don't think I can get any wetter than I already am."
"Yeah, he's getting me all turned on too," laughed Chet. "And I already heard the story from Darla."
"Hell man, you're always turned on," snorted Robbie. "Chet's been fucking his sister since they were kids, so incest is no big deal for him. Now stop interrupting."
"Yes, Sir!" chirped his young, black friend. "Whatever you say, Sir. Marines are kinda bossy, aren't they?" he said to Zelda.
Robbie feigned a punch at Chet and then commenced to tell the older woman about Don and Sherrie inviting him to go on their honeymoon with them and of the wonderful time they had had on Incest Island.
Robbie concluded his tale with a recitation of the details of the Annual Orgy and the Islands tradition of the elder's "first rights" to the virginity of the "Birthday Girl and Boy". It was apparent that his grandmother was profoundly affected by the lewd eroticism of the story. And from the bulges developing in the pants of the two young men, it was equally obvious that they, too, were becoming as aroused as their older companion was.
"Robbie, are you going to tell her about the pictures we found?" asked Chet with a lascivious grin on his face.
"What pictures?" asked Zelda, eyeing her handsome grandson with curiosity.
"I'll do better than tell you about them," said Robbie, pulling the compromising photos out of his tunic pocket and spreading them out on the coffee table. "I'll show them to you. Mom told me I could find these pictures in her attic so I brought them along in case you needed verification of what I wanted to tell you."
"Oh, my lord," gasped the fascinated woman. "Is that who I think it is? That has to be Sherrie fucking her father. Why, she looks just like me at that age. And that has to be Jerry getting his dick sucked by my husband. My god! These are incredible. I don't think I've ever been so horny in my life, if you'll excuse me for being so blunt."
"We also found these," grinned Robbie as he laid out the ones of Zelda and Gerald in various sexual acts. "You were pretty hot yourself back then, weren't you?"
"Oh, this is so embarrassing," exclaimed the grandmother. "I can't believe Gerald kept these and even shared them with our children. That's really perverted in a wonderful sort of way. I'd forgotten all about these pictures and just assumed that Gerald had destroyed them after I left."
"I'm afraid you've got another shock coming," smiled Rob. "I just learned a short time ago that Grampa Gerald was also my father. I always thought that Uncle Jerry was my real Dad and didn't know that he was my uncle too. Mom told me that she didn't learn that she was pregnant by her father until a short time after he was killed. So she and Uncle Jerry moved to a new town after Grandpa died and lived together as husband and wife. She didn't tell me the facts of my birth until after you called her."
"I think I need another drink," sighed Zelda. "A strong one! Can I get you boys a fresh one, too? This is just too much for an old woman to digest all at once."
"Aw, you're not that old," said Chet with a lewd grin. "And, I must say, you've aged quite well from what I can see."
"My, my. Aren't you the sweet talker," chuckled the woman. "I'll bet you say that to all the old biddies."
"Only the ones with looks as good as yours," laughed the young man. "And there aren't many of those that I've met. If your still anything like these pictures, you've got to be one hot number"
"And you're a very naughty boy, making fun of a frustrated old lady that way," she replied.
Looking pointedly at the "tents" that had formed in Robbie's and Chet's trousers, she said, "I don't suppose you two handsome young men would be interested in relieving some of that frustration would you? This whole conversation has my pussy dripping, that's for sure. I could really use a 'mercy fuck' about now… Or any kind of fuck for that matter. It's been longer since I've been laid. than I care to think about and I'm as horny as I can ever remember being."
"Well, Gramma, I can promise you one thing," smiled Robbie as he took her in his arms and slipped a hand down the front of her blouse to fondle her still firm breasts and engorged nipples. "It certainly won't be a 'mercy fuck' on my part. You're still a very beautiful and sexy woman."
"I'll drink to that!" laughed Chet, moving over beside Robbie's grandmother and running his hand under her skirt and up the inside of her thighs to caress her moist and swollen pussy lips.
"And I bet you taste as good as you feel," he whispered as he gently licked and nibbled on the lobe of her ear. "Have you ever had your pussy eaten by a horny, black boy before?"
"Not that I can recall," gasped the older woman as she responded to the intense sensations of Chet's fingers probing her soaking pussy and her grandson's groping hands on her, now exposed, tits. "But I guess there's a first time for everything if you're willing to oblige this ol' gal."