Content warning: this story contains fisting

This is not the first time I’ve fucked my husband’s girlfriend. She and I aren’t dating, and mostly their relationship is separate – but the three of us tumble into bed together from time to time, when the urge strikes us.

Whenever I hold hands with someone new, they notice how small my hands are compared to theirs. Usually at this point I crack a joke about fisting, just to assess if they’re enough of a pervert to be worth dating. But until now, no-one has taken me up on the idea. Until last week, when my husband approached me with an idea for our next polycule date night.

“Anna wants to try being fisted, but she’s scared to let me do it because my hands are too big. So I came up with a creative solution. You’re going to do it for me. I’m going to use you and your small hands to fuck her.”

I gave this idea a second to sink in, and then felt a wide smile spread across my face. It was just the kind of deliciously filthy idea Scott is always coming up with. I gave my enthusiastic approval to this idea, and he went off to sound Anna out about it.

So that’s how I find myself kneeling between Anna’s long, spread legs now, watching her writhe as my husband holds the Magic Wand against her cunt, warming her up. He bends to kiss her lips, murmuring that she’s a good girl, asking her if she’s ready to take my hand inside of her. She nods so emphatically I can’t help but giggle.

The wand is switched off and laid to one side. Scott positions himself at Anna’s side, holding her hand. It’s only as I reach for the supplies – latex gloves, lube – that we stashed nearby before playtime started that I realise I’m actually nervous. Giving someone their first taste of a new experience is a big responsibility.

I take a breath and make a show of confidence as I slip a latex glove over my hand and cover my index and middle finger in lube. I slide my slick fingers over Anna’s vulva, the lube mixing with her own wetness. When I push those two fingers into her, she moans and arches her hips off the bed to meet them. Even through the glove, I can feel her warmth. I press my fingers against her G-spot, which is swollen, and stroke it.

Encouraged by her reactions, a third finger joins the two already inside her. I glance at Scott for approval. The look on his face, as he watches his wife fingering his girlfriend, is pure lust tinged with awe. I return my attention to Anna’s cunt, slowly sliding my three fingers in and out of her, warming her up and stretching her open. When I experimentally try adding a fourth finger, she welcomes it eagerly. I hold my hand still, allowing her to accustom to the sensation. She bucks against my hand, using my fingers to fuck herself.

“Are you ready for more?” I ask her. She nods, eyes closed, a blissful smile on her face. I curl my thumb under, remembering the instructions in the “how to” video I dutifully watched in preparation for tonight, and add another slather of lube to my hand before pushing very slowly back into her. To the first knuckle, then the second. Her cunt seems to be trying to swallow my hand whole.

“Breathe,” I instruct her. “We’re at the widest part of my hand now. I won’t go any further until you tell me you’re ready.” I watch her chest rise and fall as she takes one, two, three deep breaths.

“Okay,” she says, “go on.” I take her free hand with mine, hoping she can feel the love and affection that I’m radiating towards her. She takes another breath and as she exhales, the widest part of my hand

“One more little push and my whole hand will be in,” I tell her. “Do you want to take it for me?” Her nod is emphatic. I mentally thank the universe for my small hands.

Another slick of lube and another gentle push, and my entire hand is inside her up to the wrist. The sound that comes from her is somewhere between a moan and a growl. I experiment with gently moving my fingers inside her, and then slowly turning my wrist 180 degrees, feeling her vaginal walls enveloping my hand.

I meet Scott’s gaze, and my eyes flick to the Magic Wand and then back to him. He grins, understanding my meaning, and grabs the toy. He turns it to full power and presses it into Anna’s vulva. The way she squirms, the sounds coming from her, make me so fucking wet that I can feel myself soaking my knickers.

“I’m really close…” Anna gasps, her cunt clenching around my hand.

“Come for us, darling,” Scott tells her. I feel her gush, fluid leaking around my hand and pooling on the bed beneath her arse. A flush creeps across her skin and her breathing slowly returns to normal.

“That was… fucking incredible,” she gasps.

It’s only when I withdraw my hand and peel off the glove that I realise I’m still wearing my wedding ring. I smirk to myself. Fisting my husband’s girlfriend on his instructions might be one of the hottest and filthiest things I’ve ever done.

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