"Dad, I think Cami is cheating on me. She seems so much looser than she used to."
It was unlike my son to talk about sex with me, so I knew he must be some upset. Still, I had to be careful in my response. After all, it was my cock which had stretched her out. Cami had been amazed by the size of my ancient cock, especially its girth. She had assumed that size was hereditary. Never having seen my son with an erection, I had not realized that he had missed out in the size department.
"I really doubt that. Poor girl never leaves the house, what with home schooling the twins."
Now eight, my grandsons had been a pleasant shock after my son had a vasectomy which had apparently failed. My granddaughter Kelli had been born ten years earlier. After several miscarriages Cami had tearfully given up trying. The twins pleased my son, who had always wanted a boy, but as devoted a dad as he was, Cami was obsessed with her "little gifts from God." She never returned to her teaching job after her maternity leave. Luckily I was able to get my son a well paid job with a friend's construction company, so they could afford Cami staying home. Home schooling allowed her to not cut the apron strings, something that I wondered about in terms of the boys social development, but they seemed normal, and joined lots of sports teams and played with neighbourhood chums.
"I hope you're right, Dad."
Just then Kelli walked into the room.
"What's Gramps right about this time?" my granddaughter giggled. "He usually is right about most things."
"Just how much your mother loves us," my son quickly improvised.
"And she will always love Gramps the most..." Kelli laughed. "I guess Mom's always been a daddy's girl."
"But he's not even her father," my son looked puzzled.
"I guess he'll just have to do until the real thing comes along," Kelli replied.
Cami had been close to her Dad but he had taken off a few years back with his secretary, now his much younger trophy wife. They now lived on the left coast, and weren't about to visit the snowy Midwest for Christmas. I could not help but note that the secretary had looked a lot like Cami - the same auburn hair, the spray of freckles across the bridge of the nose, the high tight perky tits, well defined waist, bubble butt and long shapely legs.
The recollection made my manhood chub up in my pants. I thought perhaps that I spotted Kelli's gaze falling to my groin, but I decided that was just my hormones. I shook my head slightly, amazed at how much more virile I had felt since fucking my daughter-in-law. Now my granddaughter was making me tingly, though I was sure I was just imagining her curiosity.
My eyes still travelled up and down Kelli's body, appreciating her beauty. She looked like a younger version of her mother, but with the hair slightly longer, the hips a bit less pronounced, the boobs maybe a bit smaller, but they looked former when I had seen Kelli sunbathing.
I glanced over at the dining table, trying to move my focus away from Kelli, but that just made me think of how just over an hour before, I had entered the room and silently bent Cami over the table, lifted her conservative house dress to her waist, pushed aside her not so conservative lacy boy shorts, and thrust my already hard meat deep into her cunt, which had swallowed me greedily, pulsing and lubricating the instant my tip pressed against her labia. My hands had run up her flanks, pausing briefly to caress her hips and her belly, before grabbing on to her tits to use them as handles, pulling her back to meet each thrust.
The thrill of possible discovery made the fucking that much more intense, though I knew that my son had taken the twins to the park to practice soccer and Kelli was out somewhere. Still, they could return at any time.
"I love how ready you are for me," she gasped. "I keep seeing wood in your pants whenever you look at me. It does wonders for the self-confidence of a middle-aged mom."
"And it seems to make you all wet and just as ready, which in turn makes me even hotter for you. Mind you. I don't think you need me for self-confidence. You are such a MILF that all of Kelli's guy friends get hard watching you by the pool. And I think you must make half the girls wet too."
My cock throbbed and got even fatter at the thought of watching Cami pulling a bisexual train by the pool. I was so glad that I had gifted the installation cost to my son when he had turned forty. I had hoped that he would enjoy the views as much as I did, but he seldom raised his nose from business reports. His daughter had blossomed into an eighteen year old fuck bunny under his unnoticing nose. It was only natural that I take advantage of his disinterest to fuck his wife.
My nose was more useful, handy to nudge Cami's hair aside and allow me to nibble her right ear lobe. That made her sigh deeply and her hips pushed back more ferociously against my groin. My tongue teased her inner ear, making Cami groan, arching her back, driving my cock deeper into her womb as I rocked her against the table. My fingers closed over her diamond hard nipples and gave them a tug. I felt the shock run through her spine, no doubt exploding into her brain at the top, and inflaming her clit at the bottom. This provided a distraction as my lips closed over the curve where Cami's neck turned into her shoulder.
"Don't leave a mark, please," Cami begged as my teeth grazed her flesh.
"Please, who?" I growled, breathing the words right into her ear. She was panting heavily, gasping for breath. I felt her hips start to rotate, as her abs fluttered, clenching around my fatness, but then relaxing, only to clamp down even harder.
"Please, Daddy, don't mark me as yours," she gasped,"I can't have your son, my husband, see a mark. Even he may not be dense enough to miss that."
I chuckled at Cami's casual dissing of her hubby.
"I wish that I could fit your fat cock up my ass. That way my cunt would stay tight for his skinny dick."
"We can try again, but right now I need to fill you up with my seed."
"My real Daddy stretched me out with his fingers and used lots of lube. No one ever figured out that he was fucking me because we only did it up the ass. I was still technically a virgin when I met you son."
"You miss your Daddy don't you?"
"His cock wasn't as special as yours, but I was really glad after a while that I had promised Mom that I would take care of him after she passed away."
Cami grunted as I nipped the flesh out to the point of her shoulder.
"I hated it when he took off with that bitch he married," she continued, "after I had taken such good care of him, including let him fuck both my holes - plus my mouth - after I got married."
Her palms pressed against the wood, allowing her to push back and up from the table, fucking me as much as I was fucking her.
"You must have been pleased then when your mother-in-law asked you to take care of me."
Cami laughed lustily as her juices coated my balls, which were rolling in their sack, about to pump forth great gobs of goo.
"I just wish she had warned me just how fat your cock is. She said it was huge, but I didn't know what she really meant until I experienced it for myself."
