We moved closer to the wall so that she could rest her head on one forearm against the tiles. That freed her other hand, and she reached between her legs and began massaging my balls. Then she focused on herself, stroking her clit until she came on my cock. I held her up as her legs turned to jelly and her juices ran down her thighs, mingling with the warm water still cascading over our bodies.
I led her through to her bedroom and saw the bottle of lube in the middle of the bed. I told her to get on the bed on her knees, and she thrust her sexy well-rounded ass in the air with her pussy and asshole fully on display. I got on my knees and I began licking her clit and her pussy, pushing my tongue as deep inside as I could reach. Then I moved up to her ass, licking her tight little hole, slowly at first, and then with rapid flickers, as she cooed with pleasure. I stood up and eased my cock between her pussy lips, stroking her asshole with my thumb as I sank my cock deep into her wet pussy.
I poured plenty of lube on my thumb and began stroking her hole as I fucked her, gently easing more and more of my thumb into her ass. I was soon thumb -fucking her ass in time with my cock fucking her pussy.
Dee groaned. “Mmm, take your thumb out. Fuck my ass with your big hard cock. I need that cock in my ass.”
I squirted lube over her hole, and then all over my cock, making sure it was well covered. Then I nudged the head of my cock up against her ass. Holding her waist, I pulled her onto me as I pushed my hips forward. I felt resistance at first, but suddenly it gave way and my cockhead pushed through her tight ring.
We both groaned loudly. I pushed again, slowly sliding my cock deeper and deeper into my sister’s waiting ass until I had hilted her. I withdrew to the head, applied some more lube to my glistening shaft, and then slowly pushed in again, and then again, getting quicker every time.
Dee began pushing back against me as I fucked her ass faster and harder. She stroked her clit and urged me on. “Ooh yeah. Fuck my ass. Fuck it harder. Cum in my ass, bro. Cum deep inside my ass!”
I knew we were both approaching climax. I fucked her as hard and as fast as I could, as she frantically rubbed her clit until we both cried out together. Dee hit her third orgasm just as I unloaded several thick streams of hot cum deep into her ass.
It was unreal. I was cumming in my sister’s ass, and it felt awesome. I kept fucking her until I was I totally drained, and we collapsed onto the bed together, panting hard.
When she got her breath back, she looked up at me and smiled. “I hope you’ve got an extra-hard work-out planned today, to punish your wicked little sister for being so naughty.”
I laughed. “Oh yeah. It’s going to be even harder than my cock has just been. If that’s possible. Shit, you’re hot, sis.”
She snuggled into me. “I don’t ever want to stop doing this with you.”
“Well, as long as we’re careful not to get caught, we don’t need to stop.”
“Getting caught is what I’m worried about. I can’t begin to imagine the fall-out from that.”
“Yeah, I know. But that’s where being brother and sister is an advantage. Unless we get caught with me literally balls-deep inside you, nobody is going to think for one moment there’s anything going on between us. It’s the perfect cover.”
She smiled, and visibly relaxed. “Yeah, you’re right. Good! Come on then bro,” she said, getting up off the bed. “You’ve worked my ass hard with your cock, so now you can work my ass hard in the garage, and when you’re done with me I’ll let you empty your balls in me again. Anywhere you like.”
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