We were at a gathering, and I my phone pinged and I got a text from my girlfriends sister Nancy saying, “Come out to the summerhouse, my panties are so wet, I want to suck your cock, and she’s left you alone again as normal, while she flirts,” and being that my girlfriend Carla was busy chatting and flirting like her sister said, I decided to go and see Nancy.

So as I was walking out to the summerhouse I was getting excited by the thought of Nancy’s text, and my cock was already getting hard. As I opened the door there stood Nancy in a shirt and short skirt, showing of her assets, her lovely big tits, and lovely big bubble ass, which gave me an immediate hard on.

As I shut the door Nancy didn’t waste any time and unzipped my jeans and pulled them down, my cock was bulging through my boxers, and she grabbed my boxers and pulled them down making my cock spring out. "OH MY GOD ITS SO BIG, I’D FORGOTTEN." Nancy said, as she stared at it and finally wrapped her little fingers around it and felt my throbbing cock.

Nancy said, "God Its so big I can feel it throbbing in my hand..you know what my husband is like, always too busy, I haven’t had cock for months." and she wrapped both her hands around my cock and began stroking faster, and said, "You like me stroking your cock up and down, don’t worry I won’t tell Carla how much you love her sister jerking you.”

So I told her to take her shirt off, and she replied laughing, "Take off my shirt, but what do you think my husband would think of that?." then she smiled and stood up, and lifted her shirt over her head and tossed it on the floor, then she reached back and unsnapped her bra. "Hows that, do you like my big tits you pervert?" Nancy said, then she bent over in front of me and pulled her skirt down, displaying her big bubbly ass and her lace thong light blue panties. Then said, “ ok perv, want to see how wet you make me?"

And she sat on the ground and pulled her panties down showing me her beautiful bald pussy, then she got on her knee's and wrapped her sexy wet panties around my cock. And she said, "Oh you like me being a dirty girl? You like me stroking my wet panties on your cock, don’t you.?"

"YESSS, you dirty black slut." I said, then Nancy replied, "Thats right baby, your dirty black slut is stroking your big cock! I hope my sister doesn't walk in on me being such a naughty slut!" So I said,"Suck it Nancy I want to hear you sucking and slurping my cock."

Nancy said, "Damnn you dirty boy You want to hear your girlfriend’s sister sucking your cock?" So Nancy opened her mouth wide and stuck her tongue out, she grazed the underside of my cock as she wrapped her lips around it, and started sucking my cock.

She went further and further on my cock until it was poking her throat then with her tongue still stuck out she began bobbing her throat on my hard cock. She began gagging and tons of saliva began falling down off my cock and landing on her big tits. GAG..SLURP SLURP...GAGGG

So I said to Nancy, "Holy, shit Nancy that feels amazing, you do know how to suck cock, girl." as GAG..SLURP SLURP...GAGGG she continued sucking my cock. Then she gagged really loud and said, " is seeing your girlfriends slutty sister gag on your cock sexy?" GAG..SLURP SLURP...GAGGG

"I'm your little cock sucking black slut." Nancy winked, GAG..SLURP SLURP...GAGGG, I grabbed the back of her head and pushed her head down on my cock and I reached down and spanked her lovely big ass and said, " tell me how much you love sucking your sister’s boyfriend’s cock."

She flicked her tongue faster as I pushed down on the back of her head, then she came up for air and said, “ I absolutely love sucking your cock, and I’m so jealous Carla can do it whenever she wants, but I do feel so slutty with your cock down my throat.”

And she started sucking my cock again until her gag reflex... GAG..SLURP SLURP...GAGGGGG "IM YOUR COCK SUCKING BLACK SLUT!!" she screamed, "I'M SUCKING MY SiSTERS BOYFRIEND’S BIG COCK, God I'm such a whore with your big cock down my throat!" Nancy gasped.

I replied "Oh yeahhh Nancy your my black whore, and I love it." she began stroking my cock with both hands, her head bounced as she sucked my cock head, then she asked, "Thats right I'm your black whore! but am I a sexy black whore?!"

"Yeah you’re my sexy black slut!" I said, and she replied, "good because I love sucking your big cock!" and then I couldn’t hold back any longer, and started pumping my warm cum down her throat, making her gag even more.

And just as I finished filling Nancy’s mouth with cum the door sprung open and Carla walked in, and saw saw her naked sister on her knee's stroking my cock, with cum running out of her mouth. "Damn Nancy!" Carla said, as she looked over and smiled at us and then stared directly at me and said,

“ I heard what you were saying, so are you gonna make her your black slut then?" but before I had chance to answer, Nancy said. "I'm already on my knees like a cock stroking black slut...what do you think?" and they both burst out laughing.