Warning: this is a very long story. IF this is not your thing, all of my other stories are shorter!
Edited by: Sam. Thanks!
"Stop looking at her tits!" part of Will's mind was screaming, while quite another part kept playfully stealing glances at the remarkable cleavage. The cleavage in question was right next to him, in the passenger seat as he was driving. He had seen it very many times in his life. Heck, he'd even seen it bloom through its owner's puberty! Right now though, nestled as it was inside a barely visible red lace bra and framed by a shirt that was loosely opened, it was making him crazy with lust. "Why did she have to slip the safety belt under her arm?"
Will was well aware of the strap effect. This effect came about when the strap of a heavy purse passing between a woman's breasts only made them seem bigger. But when the breasts were already big to begin with, having them loose was even better. Every bump in the road made them dance, inviting and teasing his eyes. The girl beside him seemed oblivious to his glances, or if she knew, she didn't mind. What was the problem then? The oft-obsessed-over cleavage belonged to his twin sister.
Once again Will tore his eyes away and focused on the road, especially since it was covered in snow. They still had about an hour before arriving at their destination, the family cabin. Four days away from everything, with only the close family: their parents, the twins and their respective partners. Will had been in a steady relationship for three years now, and his sister Brittany just shy of two years. The six of them usually enjoyed these four traditional days a lot. This year was shaping up to be even more fun for Will though.
Then again, this was part of the problem. He hadn't seen his girlfriend for over a month now because she was far away in college. Yet in their phone calls and letters she had been just a bit more open than usual. Sexually open. Will loved Danae very much and could see himself building his life with her. She was very pretty and sexy despite smallish breasts. She filled her B cup bras well enough, but no matter how beautiful B-cup breasts could be, there are thing they just couldn't do. But that was not Will's main problem. Danae was somewhat of a prude. For her, having sex with the lights on was naughty. It goes without saying that Will's imagination could go a lot naughtier. A lot.
So during the last few weeks, when he began hearing and reading about how excited she was to finally get back to him, he had decided that this year's cabin time would be the best so far! This time she had even made it clear that she was sexually excited. He had made a mistake in the past, mistaking general excitement for sexual excitement. Bad call, wouldn't happen again... This time they were on the same page, and they would be fucking quite a lot during those days and nights. So for the past two weeks, despite his usual average of about once a day, Will hadn't masturbated at all.
That brings us back to the car, where the eyes of our poor over-excited Will had easy access to his sister's remarkable breasts. It wasn't even completely accidental. Claiming to feel cold, he had turned the heat way up. He had smiled when Brittany removed two buttons of her shirt, then a third. Now, though, his pleasure was bitter sweet. He was enjoying each and every glance, yet his hard cock was beginning to be painful and he really did have to concentrate on the road.
When the storm began, he was very happy to be only fifteen minutes away from the cabin. He helped his sister carry all her stuff and hurried to start a roaring fire inside. With the heat beginning to radiate in the living room, he smiled, then grinned as he looked at the big logs in the rack. Maybe if he accidentally built the fire too much, his sister would take off more of her clothing. Will shook his head and took a deep breath when he got up. He really had to clear his head and try not to think about his sister's breasts.
In her room, Brittany removed her winter coat as she unpacked her two suitcases even though it was still chilly. She was still feeling impish and mischievous about the car ride. Her brother hadn't really felt cold, and she hadn't actually needed to undo that third button. Ever since her breasts began to grow, she had learnt to accept and tolerate her brother's glances and sometimes even his obvious gawking. Of course it had felt really awkward and even shameful at first. A growing teenage girl was a delicate thing. But over the years, as he kept stealing glances in more respectful ways, she had begun to see it as a unique form of compliment. He had never tried anything weird, so she didn't try to stop him or dress more conservatively.
Now 23 years old, the twins didn't see each other all that often despite living in the same town. It had taken Brittany a few minutes before she understood why he brother kept turning the heat higher and higher. It was clear that he wasn't cold; his cheeks even turned red at one point. When she did click, she smiled and sighed, and began unbuttoning her shirt. Danae was pretty and fun to be with but she did have small breasts. Poor Will, having truly fallen in love with his very first girlfriend with small breasts. Brittany hoped that Danae hadn't seen pictures of Will's previous five or six girlfriends!
Now in her room, with the double bed she was going to share with her boyfriend, she forgot about her brother and grinned as she saw her little metal box, locked with a key she kept tied to her panties. Before meeting her current boyfriend, Matt, Brittany would never have described herself as wild. But slowly, he had made her discover new and unexpected sides to sexual pleasure. Making sure that the door was firmly closed and locked, Brittany stripped down to her bra and panties despite the cold. Delicately she undid the knot tying the key to her panties, and bent over the box to unlock it.
