I had been in my office when I heard footsteps above me in our bedroom and went to check it out. “Uh, God. Hmmph! Harder. Fuck my ass harder.” I heard as I approached the top of the stairs. I thought that she’d gone with my wife to take the kids to school, and she must not have known that I was working from home today. I moved silently to our bedroom door to see my sister-in-law, Kate, on our bed, in the throws of ecstasy as she impaled herself on my wife’s dildo. After a second glance, I could see that she had the dildo up her ass. “Ah, God, yes. Give it to me, Mike,” she cried my name, plunging herself flat onto her haunches. Kate rolled and gyrated her hips as she rode out the next wave of orgasm.
I have to admit that I was intrigued by what I saw. Kate’s young, taut body writhing and gyrating on my bed. Admittedly, it aroused me to no end, and I wondered if she did this every time that she visited. I stood in the doorway, rubbing my cock through the front of my pants as I willed her to turn and see me. Then, as if by magic, she turned. Kate’s mouth fell open as fear, guilt, and shame instantly flashed across her face. Kate doubled over face down on the mattress, sobbing from being caught in her transgression.
I went to the side of the bed, “Shh, Shh, Shh,” I tried to calm her. I sat on the bed next to her, patting her back, telling her that there was nothing to be embarrassed about. Kate couldn’t bring herself to look up. From my vantage point, I could see that the dildo was still penetrating her anus. I ran my hand down her spine and across her ass cheeks. I grabbed the base of the dildo and pushed it back into her bum. “Is this what you want?” My voice was barely a whisper. Kate’s only response was to push backward toward the pressure of the sex toy.
I plunged it into the depths of her bowels a little deeper with every stroke until only the end was sticking out. Kate began to moan again. “Do you like your sister’s dildo? It’s a mold of my cock that she made.” Kate shook her head yes but couldn’t bring herself to speak. “Would you like to feel the real thing? Would you like to feel my cock inside of you?” Kate shook her head no. “I heard you call my name. Are you sure that you wouldn’t want to feel my cock fucking your asshole? I know that you’d love it. You’d love the long, powerful strokes of my cock plunging into you,” I hissed as I caressed her pussy lips with my fingers. “You want me to, don’t you? You want me to fuck your ass and make you cum.”
I unzipped my pants and pulled my dick out. “Look at all the precum smeared all over the head of my cock. See how it glistens in the light.” Kate lifted her head to take a peek. “Would you like a little taste of what you’re missing by saying no?” Kate leaned her head to the side of the bed with her mouth open. I moved closer and stuck the tip of my cock into her mouth. I felt Kate’s tongue licking the tangy sweet offerings of my penis as I asked again if she would like me to fuck her in the ass. Kate took my cock deep into her mouth, flicking her tongue from side to side along the vein. She nodded her head with the tip of my cock pressed against the back of her throat.
“Yes,” she said when she pulled my cock out of her mouth. Put it in my pussy first to get it wet before you go shoving it in my ass.” Kate swung her backside to the edge of the bed, leaning back as far as she could. I let shed my pants while she positioned herself for me to fuck her. I rubbed my cock through her sloppy wet pussy lips, lining the tip up to shove it into her twat. Kate lunged back as soon as I slipped the tip in. She rocked back and forth a few times before giving me the go-ahead to pound her ass hole.
Kate’s whole body tightened when I shoved my cock up her backside. At first, I thought I was hurting her, but then I heard her groan as I bottomed out. I was balls-deep in my sister-in-law’s bum, and she was moaning in pleasure. I grabbed her hips and started to long stroke fucking her, taking my cock out to the tip and plunging it back as deep as it would go. I was literally pounding her, making her cry out. “Fuck it, Mike, Fuck my ass, you fucking ass fucking son-of-a-bitch!” she growled through clenched teeth.
I had never thought that I would ever hear a swear word out of Kate’s mouth, let alone the torrent of filth that spewed from her lips right now. “Fuck my naughty girl ass, you mother fucking. Fuck it! Fuck it.” Kate growled. I could feel her thrusting her fingers up her cunt, fingering herself as I pumped my dick into her. I pulled out to admire the gaping hole that was her anus. From this angle, I could see her fingers hard at work on her clit, so I rolled her over and shoved my cock into her pussy for good measure. I fucked her hard while she flicked her bean.
“Fuck Mike. I’m cumming so fucking hard. Fuck it. Fuck my cunt!” Kate pressed back against each of my thrusts throughout her climax. She wrapped her legs around my waist, pulling me into her with increasing speed until I, too, began to cum. I shot a huge creamy load deep inside Kate’s slut hole. Her pussy spasmed on my shaft, clenching firmly as ripples of her waning climax ebbed through her. As I pulled my shriveling cock out of her, I realized that we’d gone from In-Laws to lovers.