A very long winter…

They put away what Ralph had brought along, and did so quickly. Scotland was quite chilly this time of year, and with the sky darkening and even less sun than normal, it was even colder.

Once everything was settled, Ralph and John secured the boat they had worked on for so long, lifting it from the water inside of a secure and strong shed.

They then weather proofed the truck they kept on the farm, getting most of the fuel out of it and then securing it in a barn in the farm compound. If they needed it when the cold thawed, it needed to still function.

The crops had been harvested, and a deep well was functioning to give them water, so they spent their time making sure everything else was in order.

They had the low power reactor John and Grace had devised, so they had lighting and some heat, but they prepared to supplement it with wood in cast iron stoves, a time tested source of warmth.

And then as an early winter set in, they had time on their hands. John and Kira had an idea what had caused what was happening, the Yellowstone Caldera, but it was just a theory. Nobody really knew what would happen if it blew, just that it would be a global event.

They also didn’t know if their daughter Celeste and her son were alive, and there was no way to find out. They had to trust that she would survive if possible, and maybe one day seek them out.

With their daughter having left for a different life in the Canadian wilderness, there was no finding her. Not with the super volcano waking up as it did. They were on there own.

The free time they had on their hands did lead to plenty of sex, as Grace was enjoying the new abilities she was growing into. And as she had been told, the more she had sex with her grandfather, the stronger she felt. But also as she had been told, they all didn’t improve in the same manner.

For Grace it was beauty and physical strength, all of them got some measure of that, but what really changed were her senses and her mind.

Where Kira had a quite strong empathic ability, where she could feel what people were feeling, which made her human lie detector among other benefits, Grace noticed her physical senses grow quite strong, where her vision was fantastic. She could see in the failing light just as she could in the best of conditions, and in the dark she could see pretty well.

And she started to remember things, pretty much everything. It was like she could read a book or watch her grandfather in a task, and it was in her memory and available whenever needed. And it served them well as they spent time in the lab underground continuing a series of experiments.

With the sex Grace and John spent a lot of nights together, with Kira spending those nights with Ralph, with the two couples fucking the night away. The girls were on John‘s birth control, the only that worked for them, as they had agreed pregnancies during the winter might be a very bad idea.

They also drank a lot of Kira‘s breast milk, and there was enough for the four of them as her large breasts produced a prodigious amount of it. They only needed four to six ounces a day, but there was more than enough, and it didn’t go to waste.

And soon enough Grace was breast feeding as the two men were, but like it was for them, it became more of a sexual experience for her. Kira would fondle and play with her daughter Grace’s tits as she drank from her, pulling her daughter into a sort of sexual attraction she did not expect for her mother.

Kira still had quite a lot of sex with her father, and as the months carried on, the four of them began to explore a bit. One night Grace watched as Ralph and John had a threesome with Kira, and she masturbated as she watched her astonishingly beautiful mother get tag teamed by the two quite beautiful men.

When they finished, Ralph orgasmed first, giving him and Kira the wild orgasm they were accustomed to, the one that would have put them to sleep for hours in years past before they understood the value of the breastmilk Kira produced. After they finished, John moved in and fucked his daughter and when he orgasmed, his reaction was as expected, but for Kira it was something new.

Their strength was growing, and having the seed of both of them inside of her at the same time was enough that Kira passed out after a shocking orgasm, and slept for a couple of hours.

Grace talked it over with the two men, as they watched over her, and theorized of the value of such a double shot of semen from two of them. She stopped short of asking for it, but they could see her arousal. She was thinking about it.

After Kira woke up she was in a splendid mood, and happily discussed it with her daughter Grace. The men were preparing dinner and getting the main hall a bit warmer, so the two women had some time to themselves. And finally Grace gave into temptation.

Having Kira describe the experience of having two men orgasm inside of her back to back, two of their men, the special sort of person they were, and what was an exaggerated version of what was an already powerful orgasm that followed? That got Grace going.

As they spoke, Kira played with Grace’s hair, and caressed her beautiful body. And there was always something about Kira, who was beautiful before the changes in them, but who had become nearly impossibly beautiful.

And added to that, the curves, the exotic features, and her beautiful breasts, her empathic abilities have her the ability to seduce nearly anyone. It wasn’t something she thought about, but feeing how people were feeling gave her insight into people in a meaningful way. If her father and Grace had been made for study and learning, Kira had been made for love.

As they spoke Grace looked up at her mother and they kissed. A quick peck at first, then a sensual French kiss, something they had done many times. This became even more passionate, with the two women making out and losing themselves to lust, groping and exploring each other.

And before Grace even knew why she wanted to so much, she was between Kira‘s legs eating her pussy out, her first lesbian experience, and it was wonderful. Spectacular even, she found her mother’s flavor and scent to be intoxicating it was so wonderful. However deep she drove her tongue, her body told her to drive it deeper. And when her mother orgasmed and Grace tasted her fluids, Grace orgasmed as well.

Then Kira returned the favor, making love to Grace, and taking her time doing it. They were together like this for about an hour as Ralph and John were outside tending to the farm, getting it ready for the night, gathering wood and food for the evening.

A sort of levy broke that night for Grace. She had felt the wonderful feeling of sex with her grandfather, feeling strength and joy she had never known. Then she felt love for her mother she had never thought possible, it was amazing. Now she wanted to feel what Kira had felt when Ralph and John came inside of her, but her mother let her know she wasn’t ready. If it put her into the deep sleep, with as strong as she was, she didn’t know what it would do to Grace.

So Grace agreed to wait, but she intended to have as much sex as she could to get ready. Kira let her know that the secret wasn’t just tasting the cum of their men, or having the powerful orgasms from insemination, or from drinking or her milk, but all of them together over time.

As the days turned into weeks, at least in those first weeks of winter, it was as if Grace was obsessed with sex. They were highly sexual creatures, they fucked every day, but Grace wanted more. She wanted to measure it, to understand why. She monitored their heart rates, blood pressure, body weight and everything else she could map with what they had on hand. She could see and feel the changes.

Grace would as often walk up on Kira sucking Ralph’s cock as sucking John’s. She saw her mom fucking often, and she tired of only having sex with her mother and grandfather. So she began to seduce her father Ralph, she needed him as well.

She considered having Kira blindfold her father, but her mother refused. What they did had to be consensual, that was essential. When ****, when there was ****, or even dishonesty it didn’t work. It was a very special thing that happened for them when they loved the person they were having sex with, otherwise it didn’t work at all. And Kira had no interest in tricking Ralph into doing anything.

He would choose to do it, or he wouldn’t.

Over time Kira wore more clothing as it got colder outside, but in the warm great hall, she began to wear less and less, eventually nothing, as she was a lover to all invoked. Soon Grace did this as well.

She wasn’t the beauty her mother was, but nobody alive was, maybe nobody who had ever lived. Butt the Grace was quite beautiful.

She had her mother’s exotic features, and while she didn’t have Kira‘s muscle tone, big muscular ass, narrow waist and big tits, she was built very well. For anyone who had not seen her mother, Grace might have been the most beautiful woman they had ever seen.

This lead to even more sex, with Ralph laying Kira back on the dinner table and fucking her, and John doing the same for Grace, with the two women kissing and exploring each other as it happened.

And amid the many position changes in the warmth from a large fireplace in low light, Ralph realized that his daughter Grace had laid before him with her legs open for him, and his body told him what to do.

When he penetrated Grace it was an amazing feeling, like nothing he had felt before, even with Kira. Such was the strain of the disease that made them so special that it was always more powerful with a family connection, with shared DNA.

Ralph didn’t know how long he fucked Grace, but he knew she was more beautiful than he had ever noticed. As her tits bounced he noticed they were bigger than they remembered, which of course they were as Grace’s body was changing. Ralph noticed the fire was dying and he and Grace were covered in sweat when he finally orgasmed, and he howled in pleasure as he came inside of her.

And he heard Grace yell in pleasure as well, a melodic yell, a beautiful and soothing sound. He pushed deep inside of her and leaned down, kissing his daughter on the lips deeply, feeling her essence more now than ever.

In this moment he realized what Kira and John had been talking about. He understood why they had carried on like this for so long. And in this moment he wondered if he could ever enjoy sex with a random woman in some town while traveling would ever be enough again. He certainly doubted it could ever please him as it once had again.

Things now changed even more, with Grace spending more nights in her father’s arms, and Kira spending more nights in her own father’s arms. They still had varied sex with each other, with Grace finally enjoying a threesome with both John and Ralph finishing inside of her, a mind blowing event, something she knew was coming but wasn’t ready for.

And they spent a lot of cold days having wild foursomes. The two women fucked each other and their men, and tasted and felt cum inside of them many many times as the snow fell outside.

At this point none of them had a worry for the outside world, as the weather was too bad for traveling, and as they were prepared for a long stay inside in the warmth. A warmth enhanced by an unimaginable sex life for them.