This is related to the story, 'Mia Unzipped and Shared', but not about her exactly. Instead it is about a remarkable encounter with her younger sister Ashley. As you might recall from my previous story (might be worth reading before this one, but not essential) Mia's boyfriend and I, along with another one of his friends, had shared her in bed late one night.
We had all known each other for many years and her boyfriend and I were now working for the same company. Due to the convenience of Mia's place to the airport, friends would often stay over if they had early morning flights. And this was exactly the case when her boyfriend and I were both due to travel to New York on some business.
Mia had explained that she would not be there at the time, as she was away with some girlfriends to Europe for a short trip, but staying over was no problem. Her boyfriend always had a key for the place, although he did not stay with her all the time. The only thing that Mia had mentioned to us was that her sister Ashley may or may not be staying there for a couple of days around that time, but there was plenty room for us to stay also.
Mia and her sister were both very different. While Mia has a lovely full figure, dark hair and slightly darker olive skin, her sister was slimmer with pale skin and blonde hair. Ashley was also a few inches shorter than Mia, maybe around 5'4", making her quite petite, but she was every bit as attractive as Mia.
I had known Ashley and Mia since we were quite young and although I didn't know Ashley well, I had met her many times over the years. I had always found her attractive with a strong sex appeal, in the same way I had always thought of Mia.
John and I arrived at the apartment around 10pm and once inside it was quiet with no obvious sign of Ashley. We saw running shoes and a back pack near the couch in the living room and figured that maybe she was staying, but had gone out.
Both of us were eager to get some sleep before our early start, so I jumped into the shower first and when I got in and closed the door, the shower walls were wet and there was a strong smell of coconut shampoo or body wash. I knew Ashley had been in there recently and wondered if she was out or possibly already in bed.
After John had showered, we set alarms and both went to the room that had two small beds, used for anyone staying over. Mia had her main bedroom and there was another of similar size set up as a full time spare room. Once we had turned off all the lights and the place was dark and quiet, I asked John if we should leave a light on for Ashley or should we check if she was already maybe sleeping in the spare room.
John and I were both in T-shirt and boxer shorts, so as I got into my bed, he said he would check the spare room. I had always known that he and Ashley were quite friendly, but I was also pretty certain he found his girlfriend's sister very attractive.
I lay in bed and briefly thought about Ashley as he went to check the room. Thinking of times that I might have seen her running down the hallway after a shower wrapped in a towel or once seeing her in her underwear and T-shirt, sleeping on the couch, Mia had slapping her on the ass and told her to put some clothes on. That image was still clear in my mind.
My cock grew stiff as I thought of her as I lay in bed nice and warm. Just as I was thinking John was taking a long time checking the spare room, he came back whispering something as he entered.
"Oh my God," he said as he leaned over whispering, but with a very excited tone and look on his face.
I sat up quickly thinking there was something wrong, then he said, "Come through quietly and take a peek in the spare room."
"Is Ashley there?" I asked, but he just keep waving towards the door for me to follow him.
With a bit of concern, I followed him through the hallway until we got near the door to the spare room. I could see the door pulled closed, but not fully and a faint light inside the room.
"Carefully take a look," he said in an excited whisper.
I approached the door quietly and as I moved closer to the gap that was about 1" wide, I could see the beside lamp on and the edge of a pillow. John had his hand on my shoulder gently and was looking through the doorway as well, when he said, "Move closer."
I then moved my face right up to the gap in the door, careful not to push it open, until I could see Ashley. I saw her head on the pillow and her blonde hair at first, then with my face almost pushing the door open, I could see her bare breasts and stomach.
She was laying on her back on the bed with one arm up over her head, the hand slid under the pillow and the other hand slowly moving down over her stomach. As I adjusted again to see more and John accidentally pushed into me, the door opened just a little more. I could see Ashley was laying on the bed in a small pair of white panties.
I moved back and looked at John, then pushing him back towards the hallway and our room I said, "Let's go back and leave her," to which he seemed surprised and reluctant to do. He then took hold of my arm and said quietly, "Let's watch for a few more minutes, see what she is going to do."
Now I was in two minds, thinking of her laying there almost naked, more than likely about to masturbate, and with us having the opportunity to watch her. So we both moved back to the door, John again somehow being able to quietly push it open another inch or so. Looking in now, we could see Ashley with her head turned away from us, and her fingers moving over the front of her panties.
She had spread her thighs open with her feet pressed together on the bed, the duvet pushed down by her feet and close to the bottom of the bed. Her flat stomach was stretched tight and her already quite small breasts were looking very flat. As I looked at her, there was no way to prevent my cock from stiffening in my shorts and I was certain that John was feeling the same.
As we watched Ashley's hand moving around the front of her panties, I noticed her right breast was almost totally flat, stretched tight by her right arm that was high up over her head, only the nipple protruding upwards. Her left breast was rounder and fuller looking, due to her left hand being down between her thighs, instead of over her head.
We watched in silence as her hand moved around the front of the panties and she let the tips of her fingers trail very gently up over her stomach. Then with her hand flat on her stomach, we watched it slip down inside her panties and begin circling around her clit under the thin cotton.
This was incredible to see and I now felt my erect cock pressing at the opening of my shorts. With my face flushed red, I turned to look at John, who was one step ahead of me, his stiff cock was out of his shorts as he stroked it firmly. I glanced into the room briefly again as I heard delicate soft moans coming from Ashley.
John could not see as well now, with me at the front, and so he pushed the door once again, leaving it now half open as we both looked at Ashley masturbating on the bed. Then to my total surprise, John pulled me back from the door and pushed it fully open, walking into the room and standing at the end of the bed.
As I stood in the open doorway, my cock had pushed through the opening of my shorts and I had started to jerk off slowly, almost without thinking about it. Ashley had her eyes tightly closed and was making quite loud and very erotic moaning sounds, all as the hand down inside her panties was furiously rubbing her pussy.
The mixture of fear and excitement at the thought of her seeing us both jerking off as she lay there was something I can't describe. Neither can I explain what happened next, but reflecting on this experience now, I'm so thankful I didn't head back along the hallway to my bed.
As I stepped into the room, John was pushing down his shorts and I watched him step out of them at the same time that he pulled the T-shirt up over his head, leaving him standing naked with a throbbing erection. I could see the swollen head of his cock fully exposed as he held the base of the shaft, his pubic hair trimmed very short and his balls completely hairless.