Stan wasn't able to stay the night, so I called it a night and headed for bed, with my mind racing, thinking about what just happened. Things with my brother had been going on for years and I didn't think much about it anymore. We just had fun together when nobody else was around. Tonight that all changed. My sister Gwen had walked in on us and had actually joined in on the fun. I never thought anything remotely like this would ever happen. Sure I had watched her shower and fantasized about her beautiful body endlessly, but I never ever would have thought this would have happened. I was already beginning to think that my voyeur adventure with her in the shower had never happened. She never mentioned it or acted like it had ever happened, so I was starting to think I had dreamed it all. Eventually sleep overcame me and I drifted off.
The next morning I woke up and got dressed, wondering if the night before had really happened and if so, what would be said today. When I got downstairs, Gwen was already at the table having her coffee.
"That was. pretty fun time last night," she said. She has always been straightforward.
"I was wondering if it really happened or if I dreamed it," I told her.
"It was definitely real. I can't believe you two have been doing that together and I've never noticed. Would have been fun to join in earlier. How long has it been going on?" she asked me.
"Several years now. Started off us jsut watching porn together and progressed to us jerking off together, then us jerking each other off. Eventually we started sucking each other's cocks, and after his visit to Mexico with some liberal friends, we've been fucking each other as well. Although not too often." I explained. "We get together once in a while, but when he was at home, it was sometimes several times a week if things worked out. We both had our girlfriends off and on and this was just something to get rid of some pent up stress. It's not like either of us cruises the bars or parks and malls. It's just some fun the two of us have now and then. Moreso then these days, but last night he just happened to be in town and had some spare time and swung by to take a chance. Figured you were gone for a while and so I popped in a movie to enjoy, and got a pleasant surprise when he popped up between my legs and started taking care of my cock. I never even heard him come in - same with you. Was a bit of a surprise, but in a very good way. Did you have fun?" I asked
"Sure did. I've seen you watching me shower and peeping on me and the girls in the backyard. It turns me on knowing that you are watching and beating your meat thinking of me and my friends. They've mentioned how hot they think you are, but I never want to agree because it seems weird. I enjoy watching you when you jerk off - I've seen you a few times watching while I shower and also while you watch movies downstairs - you get right into it and don't always notice things around you. I never act on it, but after last night, I should have. Maybe we could have had fun together all these years as well."
I was dumbfounded. My sister had watched me jerk off to her in the shower and while I was watching and jerking off to porn. Unbelievable, but here she was tellng me exactly that.
"So what happens now?" I asked her.
"We can have some fun together. As long as nobody else finds out, except Stan. We can bring him in some times as well."
She slid her kitchen chair back and revealed that she was naked under her robe as she let it fall open, exposing her lovely pussy and the valley between her beautiful tits. I was starting to form a decent sized tent in my pants.
"There are a couple rules. First off, nothing but fingers and tongue inside my pussy. As much as I want to feel you deep insidee, I have to drw the line there. We can kiss, touch each other, masturbate each other and together and obviously oral sex is in, after last might, I need more of that on both the giving and receiving side. Anal sex is something else we can try - how is it? Does it hurt?"
"It can be a bit painful but in a good way the first time or two or if it has been a while. Stan and I don't do it often so it's not like we are worked in - it's still tight and feels amazing but can also be painful if too rough or fast. And Stan's got that nice big cock with the really big head that feels great once in, but might take some work to get it in. Last night I wasn't expecting it, so I wasn't tensed up waiting, so he got inside me easier than normal. It was pure heaven last night with him taking me from behind and you naked in front of me."
I walked over towards her and leaned in to kiss her. Her lips were soft yet firm and parted slightly and her tongue danced into my mouth. As our tongues intertwined, I reached down to open her robe all the way and get complete access to her amazing tits. I cupped them with my hands, feeling the heft of those beautiful round globes. My fingers went to her nipples and gave them a squeeze which made her gasp. I pulled back from her lips and looked into her eyes and the expression on her face showed she wanted more. I squeezed her tits and began kissing my way down her cheek, then her jawline, sropping to softly kiss her neck which resulted in some soft sigh-like noises. I worked my way down, kissing and licking my way to her amazing tits. I flicked my tongue on one nipple, then the other and took each one between my lips. I spent quite some time loving those tits, until she pushed me back a bit.