Doggy style

At last Susan hopped off of me and lay down beside me. She looked from my face down to my big cock and smiled, looking like someone who had achieved near perfect satisfaction.

"You need to cum, but I cant last much longer daddy," she said. "Would it help if I let you fuck me from behind?"

"Fuck yes," I said, a little too excited.

"So you like looking at my niece's ass?"

I knew she was joking, but still there was that little moment or panic, like I'd gotten caught staring at an underage girl at the mall. Except Leighjaye wasn't underage and Susan had already sandwhiched my face between those two beautiful ass cheeks.

"Gotcha," she said as she rolled over. Susan lay face down and then raised her ass seductively into the air facing me. She looked back over her shoulder at me. "Fuck me, daddy, please!"

I had jerked off to a mental image of Leighjay in just that position many times. The reality did not disappoint. She was a fucking goddess.

I crawled up behind her and let the head of my dick slide down her ass crack. Susan squirmed and moaned when it passed over her asshole. God, I would love to shove this in THAT hole, but my prude or a wife refused to do anal. Besides, her daddy's dick would rip Leighjaye's ass in half. It might feel amazing to me, but it would guarantee no more anal sex for me.

Finally the head was lined up with her pussy, and I didn't hesitate to shove it in. She was already cumming hard, so I gripped her broad hips fucked her hard and fast.

"Ohdaddy!" Susan moaned.

Leighjaye's big ass jiggled with each thrust, and I found myself staring down at her tight asshole as I fucked her. I honestly wouldn't mind putting my face back between those cheeks and licking some more, but I was getting close, so I kept going.

Finally I could feel the moment building up in my borrowed balls, so I fucked her as hard as possible. At last I exploded, dumping Steve's seed deep inside his daughter's young, nubile pussy. And there was a lot of it. I just kept fucking and cumming, emptying enough semen inside her body to put most porn actors to shame.

Susan collapsed to the bed before I was finished, so i grabbed my cock and jerked it the rest of the way, splattering her ass with the last of Steve's load. Embarrassingly I realized that that last little bit was more than I normally cum.

When I was spent, I lay down next to her and threw an arm over her. Glancing at the nightstand clock I saw that almost three hours had passed since we had first started. Then we slept.