My grandparents have a spacious ranch house with 4 bedrooms on the main floor of the house. These were perfect for them, my parents, my brother and cousin who came with us, and Michelle and Jennifer shared the 4th room leaving me the living space in the basement.
I didn't mind it at all, I actually almost preferred it. It was secluded. As you walked down the stairs which were accessible from the garage, you walked into a large, open, unfinished basement. At the opposite end of the basement was a section that was finished. 2 corner walls slatted in drywall with shelves lined with books. Just to the side was a healthy size walled off room. This made this space great, I had my own personal bathroom as there were only 2 showers on the main floor.
The downside to this was that, occasionally, others would elect to use this shower as well.
In the past this was a great hangout spot when we weren't outside. Jennifer and I would hang out down here and look through the old books. Occasionally we would play tag or hide n seek in the dark when we'd stay up here over the summer. There were a lot of good times down there.
A couple hours after dinner had finished, I found my way down to my quarters for the evening.
I had been down there with my nose in a book for the better part of an hour before I heard the door at the top of the stairs open. It was Jennifer, I watched as she shut the door and strode down the stairs. She waved and said she was going to take a quick shower since our brother was in theirs.
She was holding her gray towel and a pair of clothes for after. She was wearing her jeans and t-shirt from the car ride. She opened the door to the bathroom as I admired the view of her bottom as it disappeared behind the door frame and the door closed.
"Well that's new" I said to myself as I snapped myself out of it. I never noticed how her butt looked. And now I was staring at it... I quickly shook my head and buried my nose back into the book.
It must have been about 15 minutes when I heard the door open and Jennifer walked out. Her hair wet and laying on her shoulders. She was wearing a lavender spaghetti strap tank top. The color paired well with her fair complexion and the built in support allowed for a subtle amount of cleavage to be visible just above the low neckline.
The shirt fit tightly against her body as it outlined her torso all the way until it met the top of her soft, black cloth shorts that were rolled up at her waist causing them to be pretty short.
She took a few steps over to the end of my bed to chat. Before I could say anything, "I want to apologize for the car ride and making it awkward with me joining in."
"You don't have to apologize, it just threw me-"
"I figured this was your move on Michelle that you'd been planning over all these years and I wanted to help you out. Even if that meant me joining in."
"Wha-what do you mean 'move'?"
"I know you've had a crush on her for so long and I always wondered when you'd be bold enough to go for something. And with her breaking things off with her boyfriend, I figured it might be a good thing for her to have some fun."
"You knew this the whole time? And she's single now? When did that happen?"
"About a month ago, she didn't want to but she couldn't trust him and she couldn't live that way. She's been pretty quiet about it and earlier is about the most enthusiastic she's been in a while. So I thought I'd help both of you out."
"I didn't even know she was single... and I didn't mean to bring you into this at all. Visually, personally, all things I shouldn't have done and my eyes were bigger than my... well."
"You must have pretty big eyes then," she chuckled.
I blushed a little. "Well I'm sort of glad it didn't go any farther than it did. I wouldn't have wanted to put you in that position and to be honest, it wouldn't have been too long."
"It ended fine the way it did, you got what you wanted with an added bonus and I got to see a different side of you. It was kind of nice."
"I guess that's fair. I didn't expect much and I'm pleased with the outcome. I never thought I'd see her even close to naked. And I even got an added bonus of a second pair of boobs! Haha!" I laughed, unsure of the response she'd give.
"Awe, these old things?" She exclaimed and used her arms to push them together which further exaggerated her cleavage and leaned forward allowing them to push out more from her shirt. "I'm glad you liked them."
My eyes dropped to my sister's chest as I just stared and felt blood rush to my groin. My gaze finally was broken when she lowered her arms to her side and they fell back into the grasp of her top.
"Eh, they're alright." I clambered trying not to be too weird.
"You aren't so bad yourself" she said as her eyes went to my waistline. I attempted to cover up my growing groin a little. "Anyways, I'm gonna head back upstairs. I'll let you take care of that." She pointed to my groin. "It's been a long day and you have a lot... to process."
She turned and walked towards the stairs. She strode across the basement floor on the balls of her feet with her heels barely making contact with the ground. The result was her legs flexing, her back slightly arched forward causing her butt to stick out a little.
Her shorts were rolled up allowing the bottom of her butt cheeks to be visible with each step. Just before she got to the stairs, one of her socks hit the floor just In front of her. She stopped immediately and lowered her torso down, pivoting at her waist to reach for it. The sight was grand. My sister's legs contrasted with the black of her shorts so well. As she lowered her torso to grab, her ass tested the fabric of the shorts as it clung ever so tightly to her curves. Each inch she leaned forward was another inch of the bottom of her ass I could see. The thin strip between her legs now pulled tight against her ass and lips between her legs.
She quickly stood up, turned to look at me "Oops," she said as I had been staring with my mouth open and my hands still placed on my groin. She then turned and grabbed the railing with her free hand and skipped up the stairs one at a time until she disappeared out the door.
I was definitely hard now. But Michelle was coming down soon and I had no idea where we stood with all of today's events. I should just open my book and get my mind off of this.
Michelle came down stairs as I was reading my book. She waved at me and walked across the basement. She was wearing the same jeans and grey tank top as earlier.
She stopped for a second at the door to the bathroom, "you coming? A deals a deal."
My heart rate skyrocketed as I set my book down on the bed next to me and got up.