” yea he wanted to be polite and stand up for you” she laughed as we went inside to get our rooms. My parents, aunt and step sister got the room u...stairs, and my cousin and I got separate rooms downstairs. ” ok kids we're going to go to the casino, order some pizza if you get hungry” ” ok bye” I replied” i'm going to go take a shower” my cousin said. As my cousin walked up stairs my stepsister was coming downstairs. Wearing black short shorts and a really tight red shirt with some high heels.”. Don't move." David ordered, standing me in the middle of the room. "Take everything you're wearing off."He didn't have to tell me twice, but the instant I was bare, he slapped my ass hard. "I didn't hear, `yes sir' from that slutty mouth of yours." I..I'm sorry, sir...I'll try to do better.." I gasped."You better if you want this cock in you." he stepped out from behind me, as naked as I was except for a leather band snugged around his cock and balls."Can I suck you sir?" I begged, my body. His cock had me open and I as lose now. Try a long stroke now son, pull out completely and then push right back in balls deep. Wont that be hard to do daddy. Trust me son, my ass is open for you now. He pulled out till his cock was only between my ass cheeks, and then thrust right back in. Then he did it again and again. Gawd dam that feels amazing daddy. How do you do that? I will teach you son when I do your anal training. That starts the next time you come over for porn. Just keep fucking. "Relax. It's just a little more. Relax. Enjoy it. I won't hurt you. Enjoy it."He pressed inside me. Two fingers. Deeper than before. Almost to the third knuckle.Whispering into my ear..."You love it. You like having something in your ass."Turning to face him..."Yes. It feels so good." I moved my ass to meet his hand as he continued to move his fingers in and out of me.He locked me in his gaze. A third joined the two fingers already in me. Staring into his eyes as he fucked my ass with his.