I left work early that day, having had a splitting headache all day long. Even though I was on the road a few hours earlier than usual, the traffic was still horrible, making my head hurt even worse, but I finally managed to make it home. I just wanted to get in the bed and sleep off the damn headache.
When I got home and went inside I had expected to see my girlfriend in the kitchen as usual...she was always cooking or baking something as she loved to cook. I called out for her, but she didn't answer. Looking for her in the living room, I noticed that she must have been watching a DVD because the television was still on and the DVD screen saver had come on, like it does when you keep it paused too long, with that logo thingy bouncing all over the screen. I unpaused the DVD and much to my suprise, it was a porno vid. Hmmmm....now that was strange as I had never known her to like porn that much. She would sometimes watch it with me, but didn' t really seem to get turned on by it or be that interested in it. Turning the DVD off, I decided to go look in the bedroom for her.

As I moved down the hallway, I began to hear a sound. It was a familiar sound. The sound of my girlfriend moaning. The way she sounds when we're having sex. My heart began racing and I started breathing heavy. I was starting to get extremely pissed off, my mind racing, already filling my head full of images of what I was afraid I was going to see when I found her in the bedroom. If she was in there, in MY bedroom fucking some guy, I wanted to rush in there and beat his fucking ass before he knew what hit him! OK, calm down, calm down, I said to myself. I didn't want it to get that ugly and I didn't want to end up in jail. I tried to slow my breathing as I approached my bedroom door, which was slightly ajar. My girlfriends whimpers and moans were louder now, and more intense. It was going to take every ounce of self control I had to keep from killing this mother fucker, whoever he is, that came into MY house and started fucking MY girlfriend!

Sticking my face up to the slightly open door, I could see her laying on the bed, completely naked and, thankfully, all alone. One hand was cupping one of her firm tits, the other hand was between her legs, two of her fingers sliding slowing in and out of her very wet looking pussy. My cock was instantly hard, and as pushed the door open a little more, my hand unconciously dropped down and I started rubbing my cock through my pants. She let out a loud moan as I saw her pinching and twisting one of her nipples and finger-fucking her pussy even faster. I was afraid at first she might see me watching her, but she was looking the othe way and I was so mesmerized by what I was seeing I couldn't move or speak, I just stood there watching her. She was writhing all over the bed, arching her back, furiously finger fucking her pussy and letting out these little whimpering sounds, as if the pleasure was too intense for her to handle. I slipped my hand inside my pants and started stroking my now rock hard cock in rhythm to her fingers pumping in and out her body. I don't know why this had turned me on so much, it's not like I hadn't seen her masturbate before, but I think it was because this was the first time I had watched her without her knowing it, her pleasuring herself without any idea I was there, in the shadows, listening to her moan and watching her.
Now both her hands were on her sweet pussy, her fingers still fucking her wet slit, the other hand rapidly rubbing back on forth right above her clit. I stroked my cock harder and faster, breathing so hard I was afraid she might hear me. Her body suddenly bucked wildly, letting out a loud screaming moan, as she rammed her fingers, almost her entire hand, deep inside her now dripping cunt, still furiously rubbing her clit with the other hand. At the sight of this, I gave myself a few final strokes and shot a thick stream of cum all over the door - four or five times my muscles contracted, emptying my balls of the warm goo. I looked back up at her, she was laying quietly now, still looking away from me, her fingers lightly tracing the outline of her glistening pussy lips.
"Did you enjoy that?" she suddenly said. I remember it had startled me so much that I nearly ran away as stupid as that sounds.
"What the fu...", I stammered as she began to giggle. "How did you..."
She giggled wildy. "Peek-a-boo!" She said loudly and I looked around the room quickly. Then I saw it. The dressing mirror i the corner. I could see her smiling face staring back at me. It was at the perfect angle. SHE had been watching ME the entire time! I started to laugh, walking forward as I stirpped out of my clothes and pounced on top of her. We stayed in bed all night and all the next day. It was one of the hottest fuck sessions we'd ever had until then or since.