ALL CHARACTERS ARE OVER 18.
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It was a usual night. I was jerking off over celebrity photos. Suddenly I heard a noise. It sounded like a steps but disappeared in a second so I assumed it was nothing and continued making myself feel good.
I was getting close to the edge when I heard: "What exactly do you think you're doing?" It was my 18 y.o. sister.
My blood froze and I tried to hide my erection. Late. She pulled the blanket off of me. "Show me, go ahead. I wanna see ya."
Seeing no better option I started tugging on my dick once again trying to make it hard after the shock. It took me a minute but after a while I was bigger even than before, reaching 7.5 inches, and precum was already leaking out.
While watching she lowered one of her hands to her panties and then she started to rub her pussy through the fabric.
In a while she started moaning and moved from the doorstep onto my bed. Before falling down she pulled of her pyjamas t-shirt.
"What-what are you doing?" I asked as she moved her perky breasts closer to my face.
"What you always wanted, bro." She replied in a slutty way. "Or did you think I wouldn't notice you rubbing yourself through the sweats when we watch the TV or you taking pictures of my ass when I exercise?"
I was breathless. "I know you want this..." she carried on while replacing my hand with hers stroking my dick.
"Please don't" I tried to resist but she gripped my now throbbing cock even more tightly and started jerking me off very skillfully.
"...I've watched you big bro and I know what you like. You enjoy incest porn. And guess what, I do too."
After these words she lowered her head closer to my dick and wrapped her lips around it.
It felt heavenly to have her little, warm and moist mouth pleasure me.
At the beginning she just sucked on the head sending waves of pleasure down my body.
Then she decided to go harder on me and slowly her pace became faster and faster and my dick was sliding even deeper into her throat and I heard gagging noises from her and felt her throat muscles spasm as she tried to deepthroat me.
Saliva was now dripping down my hard member as she pushed it as far as it would go.
Feeling the pleasure I grabbed her hair and face-fucked her. She moaned as her hands were playing with her erect nipples.
"Sis, I'm gonna cum!" I grunted feeling myself about to cum. "Cum in my mouth." She whispered with a grin when she pulled out. I grabbed her head once more but this time she pushed me away.
"Let me." She added. And then started to deepthroat me once again. This was as much as I could withstand and when she trusted extra hard the one last time and took me whole I lost it.
I came into her throat. I held her head tightly on my cumming dick and felt her swallow every last drop.
I never came this much but this time I shot ropes of cum into my sister's throat almost half a minute.
When I finished she kept herself on for a little while longer to really catch everything I had to give her.