Please read chapters one, two and three before proceeding.
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Over the next couple of days mum made more of those suggestive comments, about how I was growing up and that I was becoming a man. More noticeably though was my awareness of Gail's persona, she appeared to be a lot more liberal around mum and I, both in her dress and manner than when with the other girls, I guess that all three of us had an agenda and all very similar.
One day when Gail was out I decided to have a snoop around here room, I don't know why I hadn't done it before. To my surprise I found some very sexy underwear, considering she was only 18, she had excellent taste and it was hard at first to imagine that under her trendy street clothes she wore sexy demure underwear. At the side of her bed was a book which looked like any other romantic novel but was entitled "The Forbidden Fruit". It intrigued me as the blurred image on the front was of two naked women. I flicked through the pages and read parts of what turned out to be a hot story about two women from different cultures, two women who found a fondness for each other that turned to friendship then desire and passion.
Well this was great, it cemented the suspicion that Gail might reciprocate mum should she make any advances towards her and also explained why she was more grown up and feminine than her elder sisters. It also explained too the noticeable lack of male pictures in her room.
The next thing I did was a bold step for me; one night when the house was quiet I entered Gail's room knowing that she was reading alone on her bed. I was dressed only in T-shirt and jockey shorts and asked if she would rub my shoulders for me as they ached real bad. She too was very casually dressed and had bare legs and light blue panties under her T-shirt. I managed to catch a glimpse, as she sat up, of what appeared to be her dark haired pussy, tightly covered by the thin blue material of her panties, this obviously caused my dick to stir. Gently she applied some oil and massaged my shoulders and back with such a calming and soothing effect it felt almost sexual, we talked about this and that until I mentioned her book
"What you reading?"
"Oh it's just a romance type thing, nothing too special" she replied
Not wanting to miss the opportunity I continued probing, "It looks rather raunchy to me, mind if I take a look?" Without giving her the chance to stop me I collected it from the floor and opened it, Gail made vain protests but I read out a few lines. It was describing the feeling from one of the characters to another in a strong sexual manner.
"This is great" I said "That's my type of story, two girls getting it on is wonderful!"
Gail returned to my shoulders and said in a casual tone, "me too"
My dick sprang to attention like a soldier on parade, I guessed that Gail couldn't see my condition from where she was but it would have been obvious should somebody walk in. I sat there half naked with a raging hard on as my sister, who was also half naked, rubbed oil on to my back. She seemed to enjoy taking care of me but didn't seem to show signs of wanting to take it any further. I needed to get mum in the conversation and racked my brains for something to say, it was a little loose but I thought what the hell.
"You know Gail, if mum walked in now she'd think something funny was going on"
"Oh I don't know," she said calmly, "I think mum quite likes the idea of us being more open with each other."
"Open, in what way?"
"Well, we're all grown up and I guess there's no need to behave like teenagers now." She spoke with a sense of nervousness but continued, "None of us are shy and it's so noticeable how you walk around half naked pointing that thing at us."
As she spoke she prodded me in the back and pushed a little harder against my shoulders, "Did you think we hadn't noticed it?"
There was only one thing to say. "Notice what?" sounding surprised.
"Stuart, you've been getting mum all hot and bothered now for 6 months and it's a good job the others haven't noticed, but I have."
I was flabbergasted "So what has mum said to make you think that?"
"Nothing, but it's obvious dummy, you can tell by the way she's acting, she's like a woman possessed around you. It's obvious to me how she flaunts herself and gets your attention, she even asked me things about you last week."
"Asked you, asked you what?"
"She asked if I had noticed how grown up you were now, and how you seem more confident with yourself, she jokingly mentioned she'd seen your dick and how big it looks."
Just then, and out of the blue, Gail stopped massaging me and slapped my back, "Stuart, it's me you're talking to, you can stop this bullshitting and stand up."
She pushed me away off the bed so I had to stand.
"Turn around." By the tone of her voice it was an order not a request and one I complied with.
My dick was firm and bulging my pants, like the proverbial tent pole. "See what I mean, you walk around with that thing on show and expect us not to notice."
Without any warning she hooked the finger of one hand into my waistband and pulled, exposing my hard-on. She wrapped her other, oil coated, hand around my shaft. The feeling was surreal, my own sister, only 18 months younger than I was, was about to wank me off and mum was still downstairs in the lounge.
I wanted to touch Gail but she stopped me, I wanted her T-shirt off and desperately wanted to see her sweet young pussy, but saying that, what I was more desperate for was to shoot my load. Gail's strokes were slow and firm, she held me at the base and pulled on my foreskin, she made no attempted to get closer or kiss but just gently stroked my old man as she looked into my eyes, I was at her mercy and she knew it.
