The Basement
The night at the hot springs buoyed their spirits the rest of the weekend. It was as if the world had become a little crisper, and a little brighter. Memories of their encounter flooded the gaps in their day, inspiring a persistent swelling and a slow burning urgency in their loins.
Alex excused himself from family breakfast to masturbate in the restroom, returning relaxed and clear eyed. He winked at Olivia across the table, and she grinned back knowingly. She showered after breakfast, enjoying a fast, sharp orgasm that only took the edge off the sexual tension welling up inside of her.
Their parents were in a surprisingly good mood. They even suggested a family hike - something they hadn't done in years. They packed lunch and set out along the long and winding trails through the woods, enjoying each other's company, chatting about college and the soon-to-be empty nest and all of the things that people can talk about when they're focused on the good things in their lives.
They returned in the afternoon, hot and sweaty and ready for a soak. The whole family stripped down and joined an older couple in one of the larger, cooler pools. Their afternoon experience in the spring was nothing like the intimacy of previous evening, but the twins couldn't help stealing glances and knowing looks at each other.
All in all, the trip was a rare success for the family. Despite their parents blow up on the first night, the rest of the stay was quite enjoyable - and the twins new found curiosity and excitement for each other was barely restrained.
All good things come to an end, of course. The five hour drive home grew tense as the evening grew longer. In the front seat, their mom and dad exchanged increasingly pointed comments about money and work and cleanliness. In the rear, the twins read to themselves, retreating to their inner fantasies, and blocking out the rest of the world.
It was dark when they arrived home, and the twins made themselves useful, unpacking the car as their parents poured drinks and raised their voices. Alex and Olivia excused themselves and went down to the basement.
Their room was tidy and reasonably sized, taking up the majority of the finished basement. The floor was covered with a tight brown Berber carpet, the concrete foundation walls painted a light yellow, and the space split with a curtain half way down the middle that afforded them each some privacy. Their beds were against opposite walls, which had been decorated with their own taste in posters and photos and memorabilia. Two mismatched bureaus sat next to the beds, and an old dinner table stacked with crafts and books sat in the common area at the end of the room. The walls was filled with shelving, containing more books and toys and bins and the paraphernalia of growing up.
It was a cozy room, all things considered. Just enough space for the two of them to have their own areas, and relatively quiet and cool thanks to the carpet, the dividing curtain, and the thick foundation walls. They could hear anyone walking above them, and the plumbing made gurgling noises when the toilets flushed, but all in all they had made it a nice place in the years they lived there.
Now, at the end of a long day, they put down their bags and looked at each other.
Alex smiled wearily. "I'm beat."
Olivia nodded. "Me too."
Alex looked at her for a moment, then stepped forward and wrapped his arms around her, squeezing her in a bear hug. Olivia let out a playful squeak and returned the hug, snuggling in against him.
He thought about her breasts pressing against his chest, and stroked her back affectionately, noticing her bra straps under her t-shirt. He was swelling inside his jeans, and felt a twinge of embarrassment about how quickly his body betrayed his thoughts.
She pushed her hips gently towards him, an affectionate warmth growing inside the pit of her stomach. He smelled good - warm and familiar and a little sour with sweat. She wiggled against him playfully, gave him a final squeeze and pulled back.
Olivia grinned at her brother. "You really are always horny, aren't you?"
He nodded, feeling the blood rushing into his cheeks. "It's kind of ridiculous, mostly embarrassing, and now ... extra weird because you're my sister." He shrugged apologetically.
She laughed. "Alex, I've been thinking all day about what happened last night. Watching you jerk off was really cool, and a huge turn on. I'm ok with it."
"Yeah," he nodded enthusiastically. "Watching you was amazing. " He grinned widely. "If you're ever curious about anything, I am totally happy to show you. And unless you say otherwise, I'm going be a lot less modest here in our room."
"Same," she replied, smiling openly. She bit her lip, pausing for a moment. "Seriously though, if this is going to be a thing ... we have to be really, super honest with each other. If it starts getting too weird or complicated or isn't fun anymore ... we have to stop."
He nodded. "I promise that if you say stop, I'll stop. I promise that if I'm too uncomfortable, I'll say so. I don't want to hurt you, or us."
"Me too," she said softly, stepping forward and wrapping her arms around him again. She hugged him fiercely, sighing deeply as he returned the embrace.
"So," he said hesitantly. "for the sake of total honesty, I have to admit something."
"What?"
"Well," he began, "I ... ah ... sometimes I steal a pair of your panties before I jerk off in the bathroom. Sorry."
"DUDE, I KNOW." She laughed and pulled away from him. "I mean, I do my own laundry and I know what I wear. I also know how dirty I make my underwear." She smirked and narrowed her eyes. "I'm just glad it was you, and not dad." She grimaced and stuck out her tongue in exaggerated disgust.
He grinned. "So, can I keep borrowing them?"
Olivia narrowed her eyes thoughtfully. "You can jerk off into my panties if you want, just ask first, alright?"
Alex laughed. "I accept your conditions."
