So I guess it all started in the shower, as these stories sometimes do. You see I live in a house with my wife, child, and sister in law. That came about because we took over the bills and house when her parents moved out of state last month. In this house the bathroom door does not shut all the way, a little crack is left open though you can't see anything through it, as there is a wall in the way. So in better description you would open the door to an immediate wall on the right going straight forward six feet until the shower started. Across from the shower is the toilet with a sink beside it, and a closet beside that, that you have to close the bathroom door to get to. There is a long-standing rule in the house that if the bathroom door is 'closed' you knock to make sure it is unoccupied. Ha-ha, unless you know who's in there.
So there I am taking a shower, I was rinsing the shampoo out of my hair when I swore that I heard the door creak open. The door does not open by itself, as it's quite stiff. My first and natural instinct having lived in this house a while was to call to my wife, there was no response, so I rinsed the shampoo out of my hair and realized the shower curtain was actually open a little on the side closest the door. That meant I was going to have to dry the bathroom floor. I also noticed that the bathroom door was open a bit, just enough so that if someone were standing right I would have given them quite the show. I dismissed it that one of the cats must have been pushing at it. I closed the curtain all the way finished my shower, dried the floor, and went about my day.
Over the next couple of weeks there were similar incidents. Such as one day the shower curtain was ripped of its rungs, the first two rungs closest to the door. Once again there was a creak at the door during my shower. This time I didn't call out to my wife, I didn't look either though there was no shampoo in my eyes. I simply pretended not to hear it. I figured that it was most likely my wife checking in on me, or to make sure it was me. She can do that because if it were her sister Sarah in the shower, well they're sisters so who cares. It could have also been her sister at the door looking at me. Even though her sister is not as good looking or as in shape as my wife it is very arousing to be watched. Well the thought of that just turned me on so much that I was growing a hard on very quickly. My brain went through a series of thoughts so fast that I could barely keep up. I decided to put some shampoo in my hair so I could close my eyes and not look if I hear anything. It also would put some on my hands for some smooth jacking. I started slowly at first, going up and down the length of my shaft. I was sort of fucking my hand, paying good attention to the head. It felt really, really good. I sped up a little, and then I would slow back down and just let my hand glide smoothly over the entire length. I was putting on a nice little show for either my wife who I thought was upstairs in our room, or my sister in law who I thought was sleeping. Then there was the chance it was just the cat. With all of that it didn't take me any time at all to cum all over the shower wall. I knew I heard some movement and maybe a moan from the hall.
Just about a week later I decided to test a theory and try to prove to myself who it was. I sleep naked so whenever I get ready for bed I will put on just a robe for cover if I need to go downstairs. I also just put one on if I have to go downstairs in the morning. Usually though, no one is awake at either of those times. I decided that I would get ready for bed a little early tonight and spend some time downstairs in my robe. My wife wouldn't really notice or care. So I came downstairs in just my robe, my wife was playing with the baby. We always try to tire our child out a little before bedtime so she goes to sleep faster. She asked me why I was ready for bed so early, I just told I was feeling tired. My sister in law was watching TV sitting on the love seat across from my wife who was on the couch. So I simply sat beside my wife and started to play with our little girl. During the course of playing with the baby my robe was slowly loosening. I did nothing to keep it from doing so. After our child was put to bed I let my robe get so loose that it was practically undone. I could feel a slight breeze on my now exposed cock and it started to harden immediately. Sure enough out of the corner of my eye I noticed Sarah flicking her eyes between the television and my cock. Every time she looked her gaze held longer. I made sure not to let our eyes meet, if she wanted to look at me I would do nothing to stop her but nothing to encourage. Neither would I let her know that I knew. After she had an unimpeded view for about ten minutes she had to get up and go to her room for the night. I covered myself again and tightened the robe so my wife wouldn't notice.
I am of the mind that there is a little bit of an exhibitionist in all of us, especially men. You don't even have to see the person looking at you as long as you know that they are. A woman looking at a man naked and frothing at the mouth is enough to make any man hard as rock and ready to cut diamonds. It's an ego boost for any man. It is the same for any female, or else 'Girls Gone Wild' would never exist. So naturally this whole situation was causing me no end of arousal. I made love to my wife a few more times a week. I was wearing my robe downstairs more often and letting it fall open so Sarah could see. My wife thought I was finally adjusting to the 'new' house. As far as I could tell Sarah had no idea that I knew she was looking.
I explain all of this to let you know that it was the situation not actually Sarah that was turning me on. Sarah was not exactly the best-looking girl in the world. I mean that she had never tempted me sexually. My wife had her beat in every category. The only real thing that she had going for her were her breasts. They were slightly on the larger size, about a D-cup. She wasn't too pretty in the face, not ugly either. It was just the exhibitionism that was turning me on, and I wanted to know just how far she would take it. I was curious how bold she would be. So far she had only taken advantage of little cheap sneak peeks. So another test was in order.
My wife had decided that she wanted to spend the weekend with her parents and asked if I minded. She told me that she would drive out Friday morning spend the night and drive back Sunday night. I told her of course I didn't mind but that there was no way that I could get the weekend off from work. We decided that it would be okay as long as she called me every day. This would be the perfect opportunity to test her sister!
Friday night after my wife had called me to let me know that she and the baby were safely at her mom's house I put my plan into motion. If there is one thing I know it is that sister's talk. I doubt that they had talked about this but I could bet that her sister knew I was a sound sleeper, and no snoring. Shortly after the sun went down I made my way upstairs stripped and trimmed my pubic hair. If this night went as planned Sarah would have as long of a look at my manhood as she wanted. I put my robe on and went downstairs. Like clockwork Sarah came out of her room shortly afterward. We talked for a minute about nothing. I noticed her glancing down every now and then; it had become almost habit that my robe belt would slip. It would not slip tonight, if she wanted to see it she would have to do a little work.
Flipping through the TV channels we settled on a movie that was just beginning. I laid down on the couch, while she was sitting on the love seat. At about halfway through the movie I loosened my robe a little, not enough to let it open, and 'fell asleep'. I listened to the rest of the movie, occasionally peeking my eye open just enough to make sure that she wasn't sleeping. It was dark, only one light on in the corner, just enough to see. I was starting to think that I had been completely wrong about everything. Then as the credits were rolling I heard the TV volume go almost off. She called my name in just over a whisper a couple times, then again at normal talking volume. Thank god my robe was still closed so she couldn't see me getting hard in anticipation. Then she left the room for a little bit.
When she came back I peeked one eye open. She had changed into her robe. I heard her come closer. Then I could hear her breath she was so close, she was breathing very rapid quick breaths. The next thing I felt was her hand on my crotch, she ran her hand all the way up and all the way down. Very slowly she untied the belt of my robe, and very slowly she opened it. A little gasp escaped her lips. I know she had seen it numerous times by now, I guess it must have been because she had never been this close. The next thing I felt, because I dare not even peek my eyes open, was her very hot breath on my cock. I almost thought she was going to give me a blowjob; I would have had to have woken up and stopped her at that point because she would never believe I could sleep through that. I didn't want a relationship with her either. I figured that as long as she thought she was getting away with something that all was well, even if she told my wife someday. It all had to be believable that I never knew.
As it turned out her hot breath moved up my body to my nipples. She did let her tongue slip out and lick a little on my nipples. My little tiny man nipples got very hard at that, I thought that was okay. Again her hot breath made its way up to my lips, where it lingered for a few moments before moving over to my ear.
"Are you really asleep?" She whispered softly in my ear.
I stayed stock-still.
She whispered again in my ear, this time "You have such a beautiful dick, I want it in me someday."
Then she got up and I heard her walk the few steps over to the love seat. I heard some movement and then a soft humming noise. When I peeked my eye open I saw her sitting on the love seat with her robe flung all the way open, she had her knees up to her chest with her feet on the cushions, and a 7" vibrator inside her pussy. Slowly and expertly the slid it in and out of her slit, while her other hand switched between rubbing her clit and squeezing her large breasts. I was captivated; watching her I wanted so badly to join in. I couldn't though. I had to stay there content to watch while she brought herself to orgasm. From time to time she would open her eyes and openly stare at my cock, whimpering and moaning. Once I thought I could tell that she was close to orgasm she stopped just shy. She stood up and came toward me; she got down and lay on the floor. Again the humming began. Now she was talking, very quiet just a little over a whisper.
"You can fuck me on the floor Tom, I would never tell my sister I promise. God I wish you were awake, I wish you ever flirted with me." She whispered.
It was very hard for me to 'stay asleep' but I had to. Then finally she brought herself to her finish, she must have been imagining me fucking her because as she was shaking.
"Like that Tom. I'm cumming Tom, don't stop." She moaned.
After she finished she stood up and adjusted her robe, that's when she looked at my cock and saw that little drop of precum on the tip. She leaned over and I felt her tongue lick just the very tip to clean it.
"I hope that made you have a dream of fucking me." She said.
Then off to her room she went.
After I felt enough time passed I got up and went upstairs to my room to jack off... twice. It was one of the most amazing things ever. She masturbated while looking at me and professing her need to fuck me. There's a certain power in that, at least I think so. Now I didn't know what to do, I had to think of a way to fuck her. I still had to stick to the 'me not knowing'. I just couldn't have my mistress be my sister in law that's just dangerous, but I now knew that she really wanted to fuck me bad. She just wasn't bold enough to try to fuck me this night. I actually think if I had woken up she would have freaked out. She probably also wouldn't really be my mistress even if I approached her. I was just her little fantasy, she really wanted to but most likely wouldn't.
