This is re-write of an earlier story, "Blackmailing Sister-in-Law." It had by far the most page views of any of my stories, but I was never completely happy with it. I think it works a lot better now, and hopefully you'll agree. Please vote early and often.
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It was a sleepless, frustrating night: My wife Denise was pissed off at me because the night before her sister Laney -- who was staying with us after leaving her latest live-in boyfriend -- had asked for a "loan" of ten thousand dollars to set up her new life and I'd said no. Denise knew we couldn't afford it, and she knew Laney would just blow the money and mess up her life again, but she was pissed off at me anyway because... well, Laney was still her sister, I guess.
No big deal really. She'd get over it. But in the meantime, no sex last night and as she always did on Saturday mornings, she took off at 5am for the gym.
A quarter after 5, the room still almost dark, she came back in, undressed, and slipped back into bed next to me. She snuggled close to me, rubbing her ass against my cock. My cock was fully hard in seconds. I'd actually been semi-hard before she came back into the room, thinking about jerking off to relieve my frustration, but now I was grateful I hadn't.
She reached back and took my cock in her hand, and rubbed it against her pussy. It was already good and wet. I fucked her vulva for a few strokes, and then she took hold of my cock again and guided it between her pussy lips. Just the head at first, letting it rest there for a few seconds, then very slowly pulling me deeper until my balls were pressed up against her ass.
She tightened her pussy muscles, massaging my cock, then she suddenly began thrusting her body back and forth against my cock, fucking me hard and fast. I reached around and grabbed one of her breasts to give myself leverage, and something felt strange, but I didn't think about it.
I came so hard, I felt dizzy for a moment.
She rolled away from me and sat up in the bed, and in the morning light I saw what I'd suddenly begun to suspect. This naked woman who's just fucked the living shit out of me was Laney.
She gave me a cold smile. "Did you have fun?" she asked.
"Yes I did. But what the fuck were you thinking? Get out of here."
"Not so fast, Mister High-and-Mighty. You don't just fuck your sister-in-law and get away with it. You're going to lend me that money I asked for, or I'll tell your sister you came into my room and forced yourself on me. That you told me if I fucked you, you've give me the money."
"You have it all figured out, don't you?"
She smiled.
"Hold that smile," I said, grabbing my iPhone from the night-table next to my bed and quickly snapped a photo of Laney naked in our bed.
"Give me that," she said.
"No, I'm going to keep this one."
"Okay, big deal. I'll say you made me come into
your