I didn't plan to do this

When I dropped by to see my married sister I got a eye full of her and her boss doing something she shouldn't be doing.

My sister is 2 minutes older then I am, and always boss me around growing up. She got away with it because she was daddies little girl. She would sit on his lap with her arms around his neck, right up until the day when she got off dad's lap with him having a huge hard on. mom flipped out on dad, with no more sitting on laps. But once mom had to sit on my lap when I was 14, and it was only a 20 minute car trip with me getting hard under mom's ass. She didn't say a word, but she had a smile on her face for hours, and when she looked at me she would turn a bit red on her face.

How my sister and me are both 22 with her married and me not even having a girlfriend, so when I dropped by her place. I just walked in like always, as I wondered who's car that was in the driveway. She had been working parttime at a check cashing place, but was always home on Mondays. I walked in not seeing her in the living room or any where, but I heard a voice, a male voice coming from her bedroom. Her husband wasn't home I knew that, so I walked back seeing her bedroom door mostly close when I heard " Ya that's it bitch, suck my cock. Deeper, take it deeper." Holy fuck my sister is fucking, or should I say sucking some stranger off in her own bedroom.

She said " Please you can't. I'm at my fertile time, so please no, I will repaid what I took, I." He stuffed his cock back in her mouth shutting her up. I took my cell out, and started to video what was going on. He then said " Get those fucking panties off or the video goes to the cops, and you go to jail." She got on the bed saying " In the drawer right there has condoms, please I don't want to get pregnant by you." He grabbed her legs pulling her to him as he said " That's your fucking problem not mine cunt." He pushed his stubby looking cock in her, as he began fucking my twin sister. It was time to act.

I slammed the door open yelling " Are you fucking raping my sister? Get the fuck out of here, or I will put you in the fucking hospital." He decided to play the big man part as he said " Fuck off, and wait your turn asshole." I grabbed his ear and twisted hard. I don't care how big you are, but if your ear gets twisted you stop doing whatever your doing. He froze, as I pulled back on his ear making him pull out of my sister's shaved bare pussy, as I forced him to the floor. I said " I video what you were doing, and whatever you have on my sister here will be deleted, or what I have goes to the bitch your married too, and she will take you to the cleaners. No more business, house, and everything else you have, got it asshole?" He nodded as I said " You have 30 seconds to be outside, getting in your car and leave. Oh and by the way you are going to give my sister a dollar an hour raise as well." He jumped up saying " Ok, just don't give that to my wife."

He ran trying to pull up his pants, as he went. My sister wrapped her arms around me thanking me but her bare maybe B cup tit was against my arm, and I felt a growing in my pants going on, with her mostly naked and all. She pulled back saying " We were a little short on money, so I put a IOU in the drawer as I took the hundred bucks to cover our bills. I didn't know he has a camera watching me, but he torn up my IOU and said if I did what he wanted, he wouldn't call the cops on me and have me thrown in jail. I'm so stupid." That's when she noticed that I was looking at her mostly naked body. " Oh crap." She said trying to cover up. I said " I will be in the living room." Getting up with her eyes going to the tent in my sweat pants, her eyebrows rose as did her smile.

She had only had her robe on that I could see when she sat down across from me. We talked about what he had been doing to her, and why and how money had been very tight for her husband and her. But as we talked her legs slowly opened to where I could see her bare pussy again, as my tent started to return in my sweat pants. She said " I think your turned on by what you saw, and by seeing my body naked, this turned you on as well, doesn't perv?" I said " Well, fuck you know you have a fucking great body, and I'm a healthy male so ya, seeing your body naked does make my,,, well you know, react to what I'm seeing." By now her legs were a good foot apart, as I thought that bitch is cock teasing me, her own brother. That's when it hit me.

I said " You know I could show this video to your husband. So what do you think about that?" She pretended to be shocked before she said " Little brother are you blackmailing me? So what do you want from me, maybe you want this?" She spread her legs wide with her hand going between as her finger began rubbing her clit. " You know if you force me to fuck you, that's call incest don't you? I bet I can't even make you wear a condom, so you could fill me with your cum right against my cervix, and maybe giving me your baby, is that what you want brother?" I wasn't sure if she thought I would run, but she needs to be taught a lesson.

Fuck I got up grabbing her hand taking her back to her bedroom ripping her robe off throwing her on the bed, as I stripped getting between her legs eating out her dripping pussy. God I dreamed of doing this before I was even a teenager, and now I was doing it. I heard " Oh brother this is so fucking nasty that your eating my pussy, and eating it so fucking good that I'm about to cum. EAT ME." As she came on my tongue. I moved up sinking my 7 inches deep in my sister, as I began fucking her hot tight pussy. She moaned " I dreamed you would do this to me one day, and I love that your fucking me. Fuck your sister, fuck me hard, make me cum on that cock of yours."

I fuck her hard and deep with her nails raking my back, as her orgasm hit her hard with her pussy grabbing me, I came right along with her. As we laid there breathing hard she said " Oh god you came in me, I could feel you shooting. I love you brother, and I love this too." I didn't know what to say but I said " I love you too." I pulled out as she pushed me on my back, as she went on my cock sucking and licking me clean. None of my girlfriends had ever done anything like this, and she soon had me regaining my hard state once again, with her getting on top fucking her tight dripping pussy on me. We fucked for a good hour with her coming a good 5 times, before I came deep in my sister once again.

She cleaned me once again before she said " I wish we had time to go again, but Jack will be home in a half hour so I guess we should get dressed, and look the way brother and sister should look, plus I have to strip the bed and put it in the wash before he gets home." We were dressed when Jack walked in saying " What the fuck is he doing here again? I don't get it why he hangs out here when I'm not around" My sister said " He's my brother and he can cum anytime he wants to cum." As she give me a wink at every cum. I left soon after with knowing I would be back again, as soon as Jack is gone. As I walked back to my parents where I still live, I wondered if my sister is fertile, and if she wants to have my baby, but where does that leave Jack her husband? Maybe she isn't all that happy with Jack, maybe she's looking for a change, or maybe she just loves fucking behind his back with me her twin brother. Fuck I don't know.