What I didn’t know was that my session just now had an audience. When my sister Madison came home, she couldn’t overhear the moans of pleasure coming from the bedroom. Her first thought was that my older brother had brought home his girlfriend, and was fucking her in his room. When it was empty, she checked my room, but found it empty as well. She then thought my dad was cheating on my mom and angrily walked upstairs to my parent’s bedroom. When she saw what was going on, she gasped loudly, but neither my mom nor me heard her due to our intense fucking and my mom’s loud moans.
The scene she saw was so hot that she couldn’t resist sticking her hand down her panties and rubbing her pussy, also moaning, but again no one heard her. She kept watching for more than an hour as I fucked my mom in different positions, wishing that she could enjoy the same experience. She climaxed several times, until she finally saw me emptying my huge load in and on my mom, and realised that she should leave before anyone found her. Since she was still horny, she went back to her room, and continued rubbing herself there.
That is also how I found her 15 minutes later, walking to my room from the shower, my cock had finally returned to its 9-inch flaccid state, when I saw my 17-year old sister, completely naked, exposing her beautiful smooth pussy and huge DD tits, the same size as my mom’s, her door wasn’t completely closed. My cock started stiffening, but I had no idea that she had just seem what had happened, until she moaned “Oh yes Ryan, fuck me with that incredible cock of yours, fuck me like you just fucked your mom you hot, dirty boy”. When I realised that she was lusting after me, my cock immediately became stiff.
Gathering my confidence, and fuelled by my desire to fuck her like I had fucked my mom, I pushed open the door and said “did someone enjoy the show”. My sister looked up at me and yelled “Jesus Ryan, what are you doing here”. “Fucking you with my big cock of course, just like you wanted”. She looked down at my cock and whispered “wow, its even bigger up close”. She reached out and touched it, marvelling at how hard it was.
Taking control, I lifted her up, sat down, and placed her in my lap, the top of my cock pushing against her tits and kissed her, as my hand found its way to her pussy and started rubbing it for her. If felt wonderful, feeling her move with pleasure, her tits hitting against my cock every time, pushed up against my muscular chest, as she moaned into my mouth from all the pleasure I was giving her, she came over and over. We both enjoyed this blissful situation for some time, but it stopped when she suddenly pulled back, breaking the kiss.
For a moment I was worried I had done something wrong, until she said “Ryan, I need you in me now, fuck me hard, I want you so much”. I lifted her onto her big double bed, before going into missionary position, bending her super flexible, long legs back until her feet were at her head, completely exposing her gorgeous pussy. I lined my cock up at her entrance and started pushing in slowly, not wanting to hurt her. “Oh Ryan you feel so good, my pussy has never been stretched like this” she moaned as more and more of my cock slipped into her extremely tight pussy, that was even tighter than my mom’s.
Similar to her, my sister came when only about half of my cock was inside her, moaning in pleasure. It was great not to have to worry about anyone finding us, my mom could hardly complain if I fucked my sister, after all, I had just done the same to her. I kept pushing and pushing, until my entire length was inside my sister’s warm pussy, that was gripping it tightly, so that at first I had difficulties pulling out again. It took a while until my slow thrusts loosened her up, so that I could then start thrusting into her harder and faster.
All the while, my sister kept cumming, begging me too keep fucking her, pushing my ego by telling me how amazing I felt and looked, if I had known fucking girls would be this easy, I would have had the confidence to start much sooner. I was enjoying myself, feeling great at how much pleasure I was giving her, the only sounds were her intense moans and the rhythmic slapping of my balls against her ass, both of which was turning me on.
After a while of lying underneath me, enjoying the feeling of letting me fuck her, my sister shouted “stop”. Again, I thought I had made a mistake, but again I turned out to be wrong. My sister took control by pushing me over onto my back and climbing on me, before lowering herself onto my cock. Next she started bouncing up and down on it, creating an even more beautiful scene for me to look at, not only could I see her face, but also her huge tits, bouncing along as she moved up and down my shaft, her flat stomach and then her perfect pussy, spread wide, with my huge length disappearing into it.
After enough of a rest, I wanted to become active again, so I started thrusting upwards, meeting her downwards thrusts, us now both moving quickly, fucking each other as hard as we could. I noticed that Madison seemed to really enjoy it, she was now continuously cumming without a break in between as we kept fucking in perfect rhythm. When she was getting exhausted, we changed positions again, with me fucking her on her desk, watching her tits bounce from my thrusts and then up against the wall, both of us enjoying the warmth of the other’s body. Finally, we returned back to our favourite position, with us both thrusting simultaneously.
Seeing her like this again was too much for me to take and, after nearly two hours of nonstop fucking, I could feel the pressure building inside my cock. I knew Madison was on the pill, so I didn’t worry about cumming inside her. I thrust into her one last time, as hard as I could, shooting my cum into the depths of her womb. Even though I had already shot my seed into my mom’s pussy today, my balls were full again, and I enjoyed the feeling of filling up my sister’s pussy to the brim.
When she was full as well, she got off me, my cock now shooting cum upwards, nearly reaching the ceiling as it flew all over the place, on her bed, me and my sister, who’s pussy was leaking some of what I shot into her. When I finally stopped, my sister thanked me and said I had done enough, she would clean up the mess, and I walked happily to my room to relax for a bit before my mom served dinner.